CN104636364B - The memory release method and device of browser - Google Patents
The memory release method and device of browser Download PDFInfo
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- CN104636364B CN104636364B CN201310554944.9A CN201310554944A CN104636364B CN 104636364 B CN104636364 B CN 104636364B CN 201310554944 A CN201310554944 A CN 201310554944A CN 104636364 B CN104636364 B CN 104636364B
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- G06F16/90—Details of database functions independent of the retrieved data types
- G06F16/95—Retrieval from the web
- G06F16/957—Browsing optimisation, e.g. caching or content distillation
- G06F16/9574—Browsing optimisation, e.g. caching or content distillation of access to content, e.g. by caching
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Abstract
The invention discloses a kind of memory release methods of browser, comprising the following steps: when detecting the release request of browser memory, obtains all accession pages of browser；According to history access time and history page focal characteristics, the rate of specific gravity of all accession pages is calculated；All accession pages are ranked up according to the rate of specific gravity, and discharge the smallest accession page of rate of specific gravity, until browser memory is lower than a preset threshold.The invention also discloses a kind of memory release devices of browser.When the present invention is by detecting the release request of browser memory, the rate of specific gravity of accession page is calculated according to history access time and history page focal characteristics, so as to filter out the best suitably superseded page, it reduces the quantity for eliminating the page and reduces the possibility recovery rate for eliminating the page, waiting time when user switches history accession page is reduced, the access efficiency of the page is improved.
Description
Technical field
The present invention relates to computer field more particularly to the memory release methods and device of a kind of browser.
Background technique
Multiple window pages can be accessed simultaneously by the browser on terminal device, to obtain the information of oneself needs.
But terminal browser product accesses a webpage using browser control part, will occupy certain memory, therefore can only once beat
Open a certain number of pages.And the history page accessed will also save, so as to access next time of user.In order to enable clear
Look at device control can accession page glibly, then must assure that enough memories, it is therefore desirable to releasing memory in time.Existing skill
, using history access time comparison algorithm, earliest partial history access will be calculated when memory reaches a critical value in art
The page discharges some or all of memory of browser control part of the page.
Above-mentioned memory release embodiments may discharge the focus page of non-focus window, so as to cause user's switch window
When, the page committed memory that needs to wait the recovery of the page, therefore can not fast and efficiently discharge.
Summary of the invention
The main purpose of technical solution of the present invention is to provide the memory release method and device of a kind of browser, it is intended to improve
The access efficiency of the page.
To achieve the above object, the invention proposes a kind of memory release methods of browser, comprising the following steps:
When detecting the release request of browser memory, all accession pages of browser are obtained；
According to history access time and history page focal characteristics, the rate of specific gravity of all accession pages is calculated；
All accession pages are ranked up according to the rate of specific gravity, and discharge the smallest accession page of rate of specific gravity, until
Browser memory is lower than a preset threshold.
Accordingly, the invention also provides a kind of memory release devices of browser, comprising:
Page acquisition module when reaching critical value for detecting browser memory, obtains all access pages of browser
Face；
Specific gravity computing module, for calculating all access according to history access time and history page focal characteristics
The rate of specific gravity of the page；
Release module, for being ranked up according to the rate of specific gravity to all accession pages, and it is the smallest to discharge rate of specific gravity
Accession page, until browser memory is lower than a preset threshold.
It is special according to history access time and history page focus when the present invention is by detecting the release request of browser memory
Sign calculates the rate of specific gravity of accession page, so as to filter out the best suitably superseded page, reduce the quantity for eliminating the page and
The possibility recovery rate for eliminating the page is reduced, waiting time when user switches history accession page is reduced, improves the page
Access efficiency.
Detailed description of the invention
Fig. 1 is the flow diagram of the memory release method first embodiment of browser of the present invention；
Fig. 2 is the process that the rate of specific gravity of accession page is calculated in the memory release method first embodiment of browser of the present invention
Schematic diagram；
Fig. 3 is the schematic diagram of interface display that browser of the present invention opens multiple windows；
Fig. 4 is the flow diagram of the memory release method second embodiment of browser of the present invention；
Fig. 5 is the process that the rate of specific gravity of accession page is calculated in the memory release method second embodiment of browser of the present invention
Schematic diagram；
Fig. 6 is the flow diagram of the memory release method 3rd embodiment of browser of the present invention；
Fig. 7 is the functional block diagram of the memory release device first embodiment of browser of the present invention；
Fig. 8 is the functional module signal of specific gravity computing module in the memory release device first embodiment of browser of the present invention
Figure；
Fig. 9 is the functional module signal of specific gravity computing module in the memory release device second embodiment of browser of the present invention
Figure；
Figure 10 is the functional block diagram of the memory release device 3rd embodiment of browser of the present invention.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
Technical solution of the present invention is further illustrated with reference to the accompanying drawings and specific embodiments of the specification.It should be appreciated that this
Locate described specific embodiment to be only used to explain the present invention, be not intended to limit the present invention.
Main idea is that providing a kind of memory release method of browser, it is applied in browser, to browsing
The memory of device is discharged, and to guarantee that browser has enough memories to carry out the access of the page, further increases the access of the page
Efficiency.When user accesses a page by browser, after browser will obtain corresponding page data from internet, by it
It is stored in memory the history of forming page, to be further continued for next time accessing.Due to existing browser can open simultaneously it is multiple
Window, and again include multiple subpage frames, that is, the link page in the page of each window.Therefore, in mobile terminal
In the case where having limit, need to clear up the history page of committed memory in time, so that user accesses the new page.It below will be right
The memory release method of browser of the present invention is described in detail.
Referring to Fig.1, a kind of one embodiment of memory release method of browser of the present invention is proposed.The browser of the embodiment
Memory release method the following steps are included:
Step S110, when detecting the release request of browser memory, all accession pages of browser are obtained；
Browser memory release request can be triggered by user to be generated, for example, finding page when user is in browsing pages
Face access speed is slower, then can trigger the memory release function in browser, be discharged with the memory to browser.This is clear
Device memory of looking at release request can also be generated with clocked flip, which can be arranged according to specific circumstances, such as make
It is primary every triggering in 30 minutes during browser.Browser memory release request can also be according to the occupancy feelings of memory
Condition triggers, such as a threshold value is arranged, and when occupied memory is more than the threshold value, then triggers the release request of browser memory.
During browser execution, detecting real-time browser memory is discharged and is requested, is released if detecting browser memory
When putting request, then all accession pages of browser are obtained.It is understood that the browser execution includes being currently running
And running background.
Step S120, according to history access time and history page focal characteristics, the ratio of all accession pages is calculated
Weight values；
The history access time refers to the access time of current page, can specifically include start access current page when
Between point, certainly can also include starting to access current page and leaving the time interval of current page.History page focal characteristics
Refer to window belonging to current page whether be focus window or current page whether be belonging to window the focus page.It obtains
All accession page of browser when, all visits will be calculated according to history access time and history page focal characteristics
Ask the rate of specific gravity of the page.If current page belongs to the focus page of focus window, rate of specific gravity highest, if current page is gone through
The access time of the focus page away from focus window history access time is remoter, then its rate of specific gravity is minimum.
Step S130, all accession pages are ranked up according to the rate of specific gravity, and discharge the smallest access of rate of specific gravity
The page, until browser memory is lower than a preset threshold.
The rate of specific gravity obtained is calculated step S120, accession page is ranked up, and discharge the smallest access of rate of specific gravity
The page, until the memory of browser is lower than safety value, which can be arranged according to specific circumstances.
When the embodiment of the present invention is by detecting the release request of browser memory, according to history access time and history page
Focal characteristics calculate the rate of specific gravity of accession page, so as to filter out the best suitably superseded page, reduce and eliminate the page
Quantity and the possibility recovery rate for reducing the superseded page reduce waiting time when user switches history accession page, improve
The access efficiency of the page.
Further, include: referring to Fig. 2, above-mentioned steps S120
Step S121, the initial specific gravity value for presetting each accession page is W0；
Step S122, judge the current accessed page whether be belonging to window the focus page；It is to be transferred to step S123, it is no
Then it is transferred to step S124；
Step S123, it calculates and obtains corresponding rate of specific gravity W1=W0+ △ W1, wherein △ W1 is preset first threshold；
Step S124, judge whether window belonging to the current accessed page is focus window；It is to be transferred to step S125；It is no
Then it is transferred to step S126；
Step S125, it calculates and obtains corresponding rate of specific gravity W2=W1+ △ W2, wherein △ W2 is preset second threshold, and is turned
Enter step S126；
Step S126, calculate the distance between focus page of each accession page and affiliated window △ W3=| H (i)-Y
(i) |, and calculate corresponding rate of specific gravity W3=W2- △ W3*2；Wherein H (i) is the corresponding page access queue of window of serial number i
Item number, Y (i) are the corresponding focus page serial number of the window；
Step S127, using the rate of specific gravity W3 as the final rate of specific gravity of accession page.
In the present embodiment, first by the current accessed page whether be belonging to window the focus page, then judge currently to visit again
Ask whether window belonging to the page is focus window, finally calculates again between each accession page and the focus page of affiliated window
Distance △ W3=| H (i)-Y (i) |, to calculate corresponding rate of specific gravity, and the rate of specific gravity is ranked up, by the rate of specific gravity
Final rate of specific gravity of the W3 as accession page.
Referring to Fig. 3, the browser execution is on mobile terminal 100, and the page of browser access is in the aobvious of mobile terminal 100
Show and is shown in portion 110.Since browser can open simultaneously multiple browser windows, to browse the different pages.Therefore pass through touching
Hair window shows that symbol 130 can show the window of all openings, such as 121 He of first window on window display area 120
Second window 122, such as Tencent's Netscape News and life channel window.Wherein in each window again accessible homepage and its
Subpage frame, that is, the link page.For example, the page listings accessed in first window 121 are as shown in table 1 below:
| The page 1 |
| The page 2 |
| The page 3 |
| The page 4 |
| The page 5 |
Wherein first window 121 is focus window.The page 1, the page 2, the page 3, the page 4 and the page 5 are in the first window
The page accessed on mouth 121, and arranged according to history access time.In addition, the history access time distance of the page 5 is worked as
The preceding time is nearest, is the focus page of first window 121.The rate of specific gravity calculating process of above-mentioned accession page is as follows:
The rate of specific gravity initial value of the page 1, the page 2, the page 3, the page 4 and the page 5 is set as W0 first.Then according to history
Access time and history page focal characteristics calculate the rate of specific gravity of accession page.By taking the page 1 as an example, since the page 1 is not affiliated
The focus page of window, therefore rate of specific gravity does not operate.The window as belonging to the page 1 be first window 121, and this first
Window 121 is focus window, so rate of specific gravity W=W0+ △ W2, in the present embodiment, and W2=4 △.Then 1 distance of the page is calculated again
The distance between focus page of affiliated window, that is, calculate distance △ W3 between the page 1 and the page 3=| H (i)-Y (i) |=|
1-5 |=4, then calculate last rate of specific gravity W=(W0+ △ W2)-△ W3*2=W0+4-4*2=W0-4.Then according to the meter of front
Calculate the rate of specific gravity that step successively calculates the page 2, the page 3, the page 4, the page 5.It similarly calculates in other browser windows and accesses page
The rate of specific gravity in face.
Finally the rate of specific gravity of all accession pages is ranked up, deletes the smallest accession page of rate of specific gravity and its in memory
In related data, with releasing memory.
Further, referring to Fig. 4, the process signal of the memory release method second embodiment of browser of the present invention is proposed
Figure.The memory release method of the browser of the embodiment includes:
Step S210, when detecting the release request of browser memory, all accession pages of browser are obtained；
Step S220, according to history access time and history page focal characteristics, the ratio of all accession pages is calculated
Weight values；
Step S230, according to history page committed memory, the rate of specific gravity of all accession pages is updated.
Step S240, all accession pages are ranked up according to updated rate of specific gravity, and it is the smallest to discharge rate of specific gravity
Accession page, until browser memory is lower than a preset threshold.
Wherein the step S110 of the working principle of step S210, step S220 and step S240 and above-mentioned first embodiment,
Step S120, the working principle of step S130 is almost the same, and details are not described herein again.Difference with above-mentioned first embodiment exists
In in addition to calculating the specific gravity of accession page according to history access time and history page focal characteristics in the embodiment of the present invention
, will also be according to history page committed memory after value, then the rate of specific gravity of accession page is calculated, to obtain final rate of specific gravity.
Include: referring to Fig. 5, above-mentioned steps S230
Step S231, it when the occupied memory of accession page is greater than preset third threshold value, calculates and obtains corresponding ratio
Weight values W4=W3- △ W4, wherein △ W4 is preset 4th threshold value, and W3 is according to history access time and history page focus
The rate of specific gravity of the page of feature calculation；
Step S232, using the rate of specific gravity W4 as the final rate of specific gravity of accession page.
As described above, the corresponding rate of specific gravity of acquisition is being calculated according to history access time and history page focal characteristics
After W3, also the last rate of specific gravity of accession page will be calculated according to history page committed memory.If specifically: occupied by the page 1
In save as 16kb, and preset third threshold value is 20kb.Since the memory that the page 1 occupies is less than preset third threshold value,
So not doing exercises work to rate of specific gravity.If saving as 25kb in the page 3 is occupied, since the occupied memory of the page 3 is greater than in advance
If third threshold value, therefore calculate and obtain corresponding rate of specific gravity W4=W3+ △ W4, in the present embodiment, which can be fixed for one
Value, can also according to history page occupy memory and preset third threshold value between difference and corresponding △ W4 is set.
The rate of specific gravity of all accession pages in each browser window is calculated, similarly to obtain the last rate of specific gravity of accession page.Finally
The rate of specific gravity of all accession pages is ranked up, the smallest accession page of rate of specific gravity and its dependency number in memory are deleted
According to releasing memory.
In addition to the specific gravity according to history access time and history page focal characteristics calculating accession page in the present embodiment
Value calculates the rate of specific gravity of accession page also according to the memory that history page occupies, so that when needing releasing memory, it can
With the more acurrate unwanted accession page of release, the access efficiency of the page is further increased.
Referring to Fig. 6, the memory release method 3rd embodiment of browser of the present invention is proposed.In the embodiment, above-mentioned steps
Before S110 further include:
Step S100, a browser control part management list is created, in browser accession page, corresponding control will be generated
Part, and the control is added in control management list.
Above-mentioned steps S130 includes: to be ranked up according to rate of specific gravity to all accession pages, obtains the smallest visit of rate of specific gravity
It asks the page, and it is deleted from browser control part management list, while deleting corresponding access data from memory.
Further, the memory release method 3rd embodiment of browser of the present invention is proposed.In the embodiment, one will be created
A browser control part management list, the access for storing history page record, i.e. one page of every access, will all generate corresponding
A control, and the control of the generation will store in the list.Therefore, in releasing memory, not only by memory to
The related data of the accession page of deletion is deleted, while will also delete the record in browser control part management list.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment side
Method can be realized by means of software and necessary general hardware platform, naturally it is also possible to by hardware, but in many cases
The former is more preferably embodiment.Based on this understanding, the memory release method of above-mentioned browser can be with software product
Form embodies, which is stored in a storage medium (such as ROM/RAM, magnetic disk, CD), if including
Dry processor tune of the instruction so that a terminal device (can be mobile phone, computer, server or the network equipment etc.)
With and execute method described in each embodiment of the present invention.
Referring to Fig. 7, a kind of memory release device first embodiment of browser of the present invention is proposed.The memory of the embodiment is released
Putting device includes:
Page acquisition module 110 when reaching critical value for detecting browser memory, obtains all access of browser
The page；
Specific gravity computing module 120, for calculating all visits according to history access time and history page focal characteristics
Ask the rate of specific gravity of the page；
Release module 130 for being ranked up according to the rate of specific gravity to all accession pages, and discharges rate of specific gravity minimum
Accession page, until browser memory be lower than a preset threshold.
During browser execution, detecting module 110, which discharges detecting real-time browser memory, is requested, if detecting clear
When device memory of looking at release request, then all accession pages of browser are obtained.It is understood that the browser execution includes working as
Before be currently running and running background.When obtaining all accession page of browser, specific gravity computing module 120 will be according to history
Access time and history page focal characteristics, calculate the rate of specific gravity of all accession pages.If current page belongs to focus window
Mouthful the focus page, then its rate of specific gravity highest, if the visit of the focus page of the history access time of current page away from focus window
Ask that the time is remoter, then its rate of specific gravity is minimum.Then, release module 130 is according to the rate of specific gravity of accession page calculated, to access
The page is ranked up, and discharges the smallest accession page of rate of specific gravity, and until the memory of browser is lower than safety value, which can
To be arranged according to specific circumstances.
When the embodiment of the present invention is by detecting the release request of browser memory, according to history access time and history page
Focal characteristics calculate the rate of specific gravity of accession page, so as to filter out the best suitably superseded page, reduce and eliminate the page
Quantity and the possibility recovery rate for reducing the superseded page reduce waiting time when user switches history accession page, improve
The access efficiency of the page.
Further, referring to Fig. 8, above-mentioned specific gravity computing module 120 includes:
Default unit 121, the initial specific gravity value for presetting each accession page are W0；
First computing unit 122 when for being the focus page of affiliated window when accession page, calculating and obtaining corresponding ratio
Weight values W1=W0+ △ W1, wherein △ W1 is preset first threshold；
When second computing unit 123 for the window belonging to the accession page is focus window, calculates and obtain corresponding ratio
Weight values W2=W1+ △ W2, wherein △ W2 is preset second threshold；
Third computing unit 124, the distance between focus page for calculating each accession page and affiliated window △
W3=| H (i)-Y (i) |, and calculate corresponding rate of specific gravity W3=W2- △ W3*2；Wherein H (i) is the corresponding page of window of serial number i
Interview asks that queue item number, Y (i) are the corresponding focus page serial number of the window；
Specific gravity obtaining unit 125, for using the rate of specific gravity W3 as the final rate of specific gravity of accession page.
In the present embodiment, the first computing unit 122 first by the current accessed page whether be belonging to window the focus page, so
The second computing unit 123 judges whether window belonging to the current accessed page is focus window again afterwards, last third computing unit
Calculate again the distance between the focus page of each accession page and affiliated window △ W3=| H (i)-Y (i) |, to calculate corresponding
Rate of specific gravity, and using the rate of specific gravity W3 as the final rate of specific gravity of accession page.So that release module 130 is to all access pages
The rate of specific gravity in face is ranked up, and the smallest accession page of rate of specific gravity and its related data in memory is deleted, with releasing memory.
Further, referring to Fig. 9, the memory release device second embodiment of browser of the present invention is proposed.Implement first
On the basis of example, above-mentioned specific gravity computing module 120 further include:
4th computing unit 126, for when the occupied memory of accession page is greater than preset third threshold value, calculating to be obtained
Corresponding rate of specific gravity W4=W3- △ W4 is obtained, wherein △ W4 is preset 4th threshold value, and W3 is according to history access time and to go through
The rate of specific gravity of the page of history page focus feature calculation；
The specific gravity obtaining unit 125, for using the rate of specific gravity W4 as the final rate of specific gravity of accession page.
In addition to calculating accession page according to history access time and history page focal characteristics in the embodiment of the present invention
, will also be according to history page committed memory after rate of specific gravity, then the rate of specific gravity of accession page is calculated, to obtain final specific gravity
Value, so that more acurrate can discharge unwanted accession page when needing releasing memory, further increase the visit of the page
Ask efficiency.
Referring to Fig.1 0, propose the memory release device 3rd embodiment of browser of the present invention.Based on the above embodiment, this reality
Apply the memory release device of the browser of example further include:
List of controls creating unit 140, for creating a browser control part management list, in browser accession page
When, corresponding control will be generated, and the control is added in control management list.
Above-mentioned release module 130 is also used to: being ranked up according to rate of specific gravity to all accession pages, it is minimum to obtain rate of specific gravity
Accession page, and it is deleted from browser control part management list, while corresponding access data are deleted from memory.
In the embodiment, a browser control part management list will be created, the access for storing history page records, i.e.,
One page of every access will all generate a corresponding control, and the control of the generation will be stored in the list.Therefore,
In releasing memory, not only the related data of accession page to be deleted in memory is deleted, while will also delete browser control
Record in part management list.
The above description is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all utilizations
Equivalent structure or equivalent flow shift made by description of the invention and accompanying drawing content is applied directly or indirectly in other correlations
Technical field, be included within the scope of the present invention.
Claims (10)
1. a kind of memory release method of browser, which comprises the following steps:
When detecting the release request of browser memory, all accession pages of browser are obtained；
According to history access time and history page focal characteristics, the rate of specific gravity of all accession pages is calculated；All visits
It asks in the page, the rate of specific gravity and accession page of each accession page are partitioned into negative away from the access time of the focus page of focus window
It is related；
All accession pages are ranked up according to the rate of specific gravity, and discharge the smallest accession page of rate of specific gravity, until browsing
Device memory is lower than a preset threshold.
2. the memory release method of browser according to claim 1, which is characterized in that described according to history access time
And history page focus, the rate of specific gravity for calculating all accession pages include:
The initial specific gravity value for presetting each accession page is W0；
When accession page is the focus page of affiliated window, calculates and obtain corresponding rate of specific gravity W1=W0+ △ W1, wherein △ W1
For preset first threshold；
When the window belonging to the accession page is focus window, calculates and obtain corresponding rate of specific gravity W2=W1+ △ W2, wherein △ W2
For preset second threshold；
Calculate the distance between the focus page of each accession page and affiliated window △ W3=| H (i)-Y (i) |, and calculate phase
The rate of specific gravity W3=W2- △ W3*2 answered；Wherein H (i) is the corresponding page access queue item number of window of serial number i, and Y (i) is
The corresponding focus page serial number of the window；
Using the rate of specific gravity W3 as the final rate of specific gravity of accession page.
3. the memory release method of browser according to claim 2, which is characterized in that described according to history access time
And history page focal characteristics, after the rate of specific gravity for calculating all accession pages further include:
When the occupied memory of accession page is greater than preset third threshold value, calculates and obtain corresponding rate of specific gravity W4=W3- △
W4, wherein △ W4 is preset 4th threshold value, and W3 is the page calculated according to history access time and history page focal characteristics
The rate of specific gravity in face；
Using the rate of specific gravity W4 as the final rate of specific gravity of accession page.
4. the memory release method of browser according to claim 1, which is characterized in that described to detect browser memory
When release request, before all accession pages of acquisition browser further include:
A browser control part management list is created, in browser accession page, corresponding control will be generated, and by the control
It is added in control management list.
5. the memory release method of browser according to claim 4, which is characterized in that it is described according to rate of specific gravity to all
Accession page is ranked up, and is discharged the smallest accession page of rate of specific gravity and included:
All accession pages are ranked up according to rate of specific gravity, obtain the smallest accession page of rate of specific gravity, and by it from browser
It is deleted in control management list, while deleting corresponding access data from memory.
6. a kind of memory release device of browser characterized by comprising
Page acquisition module when reaching critical value for detecting browser memory, obtains all accession pages of browser；
Specific gravity computing module, for calculating all accession pages according to history access time and history page focal characteristics
Rate of specific gravity；In all accession pages, the rate of specific gravity and accession page of each accession page are away from the focus page of focus window
Access time interval be negatively correlated；
Release module for being ranked up according to the rate of specific gravity to all accession pages, and discharges the smallest access of rate of specific gravity
The page, until browser memory is lower than a preset threshold.
7. the memory release device of browser according to claim 6, which is characterized in that the computing module includes:
Default unit, the initial specific gravity value for presetting each accession page are W0；
First computing unit when for being the focus page of affiliated window when accession page, calculating and obtaining corresponding rate of specific gravity W1
=W0+ △ W1, wherein △ W1 is preset first threshold；
When second computing unit for the window belonging to the accession page is focus window, calculates and obtain corresponding rate of specific gravity W2
=W1+ △ W2, wherein △ W2 is preset second threshold；
Third computing unit, the distance between focus page for calculating each accession page and affiliated window △ W3=| H
(i)-Y (i) |, and calculate corresponding rate of specific gravity W3=W2- △ W3*2；The corresponding page of window that wherein H (i) is serial number i is visited
Ask that queue item number, Y (i) are the corresponding focus page serial number of the window；
Specific gravity obtaining unit, for using the rate of specific gravity W3 as the final rate of specific gravity of accession page.
8. the memory release device of browser according to claim 7, which is characterized in that the computing module further include:
4th computing unit, for calculating and obtaining accordingly when the occupied memory of accession page is greater than preset third threshold value
Rate of specific gravity W4=W3- △ W4, wherein △ W4 be preset 4th threshold value, W3 be according to history access time and history page
The rate of specific gravity for the page that focal characteristics calculate；
The specific gravity obtaining unit, for using the rate of specific gravity W4 as the final rate of specific gravity of accession page.
9. the memory release device of browser according to claim 6, which is characterized in that further include:
List of controls creating unit will be generated for creating a browser control part management list in browser accession page
Corresponding control, and the control is added in control management list.
10. the memory release device of browser according to claim 9, which is characterized in that the release module is also used to:
All accession pages are ranked up according to rate of specific gravity, obtain the smallest accession page of rate of specific gravity, and by it from browser
It is deleted in control management list, while deleting corresponding access data from memory.
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