tag:blogger.com,1999:blog-2683431904392903776.post8281521963372450122..comments2023-10-07T00:40:18.776-07:00Comments on V8 JavaScript Engine: Code cachingUnknownnoreply@blogger.comBlogger21125tag:blogger.com,1999:blog-2683431904392903776.post-83255278726074627352016-08-23T00:01:46.114-07:002016-08-23T00:01:46.114-07:00How dose chrome identify the same script for code ...How dose chrome identify the same script for code caching? Two same urls may have different content, and two different urls may have same content. Anonymoushttps://www.blogger.com/profile/11116493737070131516noreply@blogger.comtag:blogger.com,1999:blog-2683431904392903776.post-83776780094667931322016-03-07T00:55:20.426-08:002016-03-07T00:55:20.426-08:00I tried to run the Chromium with --v8-cache-option...I tried to run the Chromium with --v8-cache-options=code<br />But this option can't work with 'file://' uris. <br />How can we enable this feature with local file? Sarhttps://www.blogger.com/profile/11777329311047270080noreply@blogger.comtag:blogger.com,1999:blog-2683431904392903776.post-81106592417554564732016-02-26T22:54:29.252-08:002016-02-26T22:54:29.252-08:00You can run Chrome with --v8-cache-options=code to...You can run Chrome with --v8-cache-options=code to cache on first compile.hashseedhttps://www.blogger.com/profile/14860918273740967412noreply@blogger.comtag:blogger.com,1999:blog-2683431904392903776.post-88614467573202232922016-02-26T22:54:26.610-08:002016-02-26T22:54:26.610-08:00Not under development unfortunately. Optimized cod...Not under development unfortunately. Optimized code are context-dependent, but the code cache must not be. Besides, optimized code is only generated for hot code, not on initial compile. Caching optimized code would not improve startup performance at all.hashseedhttps://www.blogger.com/profile/14860918273740967412noreply@blogger.comtag:blogger.com,1999:blog-2683431904392903776.post-36627472522963776172016-02-26T22:53:51.259-08:002016-02-26T22:53:51.259-08:00Not under development unfortunately. Optimized cod...Not under development unfortunately. Optimized code are context-dependent, but the code cache must not be. Besides, optimized code is only generated for hot code, not on initial compile. Caching optimized code would not improve startup performance at all.hashseedhttps://www.blogger.com/profile/14860918273740967412noreply@blogger.comtag:blogger.com,1999:blog-2683431904392903776.post-86635482778713192482016-02-26T22:51:06.581-08:002016-02-26T22:51:06.581-08:00You can run Chrome with --v8-cache-options=code to...You can run Chrome with --v8-cache-options=code to cache on first compile.hashseedhttps://www.blogger.com/profile/14860918273740967412noreply@blogger.comtag:blogger.com,1999:blog-2683431904392903776.post-54869213383191544172016-02-26T22:49:43.687-08:002016-02-26T22:49:43.687-08:00That's correct.That's correct.hashseedhttps://www.blogger.com/profile/14860918273740967412noreply@blogger.comtag:blogger.com,1999:blog-2683431904392903776.post-33529678775466569652016-02-26T22:48:55.204-08:002016-02-26T22:48:55.204-08:00Unfortunately not. A browser tab consists of a lot...Unfortunately not. A browser tab consists of a lot more than the script's compiled code. hashseedhttps://www.blogger.com/profile/14860918273740967412noreply@blogger.comtag:blogger.com,1999:blog-2683431904392903776.post-36709830099156718932015-11-12T04:23:11.980-08:002015-11-12T04:23:11.980-08:00After some investigation I see that caching functi...After some investigation I see that caching functionality is supported for http(s). (On Resource creation, CacheHandler is created only for http family). About producing code cache, if the resource is seen 2nd time with in the so called "hotHours" (72 hours in current implementation), then it produces cache for future use.Anonymoushttps://www.blogger.com/profile/02416600693480807859noreply@blogger.comtag:blogger.com,1999:blog-2683431904392903776.post-40647798172830969332015-11-09T07:11:02.150-08:002015-11-09T07:11:02.150-08:00It is mentioned above that "it produces cache...It is mentioned above that "it produces cache data if the same script is seen at least twice within a couple of days". Is it possible to force producing code cache on the 1st time loading of the javascript? Is there any configuration in Source/bindings/core/v8? <br /><br />Also, for file:// uris, it is not seen that compileAndProduceCache() / compileAndConsumeCache() etc are not happening, but subsequent loading (3rd time onwards) of scripts are faster just like in http:// requests. Hows it done for file:// uri? Any code paths to look for?Anonymoushttps://www.blogger.com/profile/02416600693480807859noreply@blogger.comtag:blogger.com,1999:blog-2683431904392903776.post-67387754638378839202015-09-16T12:43:54.579-07:002015-09-16T12:43:54.579-07:00This is Totally New to me,I'm quite Com.Illite...This is Totally New to me,I'm quite Com.Illiterate,this is Amazing!!! Thank You All for Your Service!!Anonymoushttps://www.blogger.com/profile/03549752119340224729noreply@blogger.comtag:blogger.com,1999:blog-2683431904392903776.post-71715132231806141712015-08-10T14:36:56.262-07:002015-08-10T14:36:56.262-07:00Does this mean that tab runtime memory equals its ...Does this mean that tab runtime memory equals its disk cache? Will this allow OS VM manager to "page out" site's memory without using the pagefile but just "paging it out" using browser's disk cache?jimhttps://www.blogger.com/profile/16460570367675013874noreply@blogger.comtag:blogger.com,1999:blog-2683431904392903776.post-9421497129285370372015-08-10T14:32:47.000-07:002015-08-10T14:32:47.000-07:00This comment has been removed by the author.jimhttps://www.blogger.com/profile/16460570367675013874noreply@blogger.comtag:blogger.com,1999:blog-2683431904392903776.post-81348892605489559392015-08-03T17:57:01.480-07:002015-08-03T17:57:01.480-07:00Is it under development? I was wondering when the ...Is it under development? I was wondering when the feature would be released. Could you explain a little more about what prevents caching optimized code the future plan? Thanks!Jasonhttps://www.blogger.com/profile/00379788459499210802noreply@blogger.comtag:blogger.com,1999:blog-2683431904392903776.post-5995390657162322622015-07-28T01:37:15.969-07:002015-07-28T01:37:15.969-07:00Currently, optimized code compiled in V8 are conte...Currently, optimized code compiled in V8 are context-specific. They can therefore not be ported from one V8 instance to another. This may change in the future though.Yang Guohttps://www.blogger.com/profile/03570875792216140876noreply@blogger.comtag:blogger.com,1999:blog-2683431904392903776.post-81175485637091261422015-07-28T01:19:52.891-07:002015-07-28T01:19:52.891-07:00Thank you for the answers. Do you also cache optim...Thank you for the answers. Do you also cache optimizations?PhistucKhttps://www.blogger.com/profile/06666208790643226861noreply@blogger.comtag:blogger.com,1999:blog-2683431904392903776.post-22513065596152832902015-07-28T01:05:40.915-07:002015-07-28T01:05:40.915-07:00Currently Chrome only caches scripts that have an ...Currently Chrome only caches scripts that have an HTTP cache entry. However, this is an implementation detail in Chrome. The V8 feature is not inherently limited to those scripts.Yang Guohttps://www.blogger.com/profile/03570875792216140876noreply@blogger.comtag:blogger.com,1999:blog-2683431904392903776.post-28991366516583954742015-07-28T00:58:12.453-07:002015-07-28T00:58:12.453-07:00We have a quick integrity check to avoid accidenta...We have a quick integrity check to avoid accidental data corruptions (those happen quite often across the hundreds of millions of users). But the integrity check does not use a cryptographic hash. We do not rely on this check to prevent malicious data.<br /><br />The reason is that if an attacker can write to disk, he has already won. In that case, there are many easier ways to cause harm than to abuse Chrome's code cache.<br /><br />V8 itself does not deal with storing or loading the cache data (as apparent from the API). Chrome does that by allocating a secondary stream for the cache data alongside the script source in the HTTP cache.<br />Yang Guohttps://www.blogger.com/profile/03570875792216140876noreply@blogger.comtag:blogger.com,1999:blog-2683431904392903776.post-47763109041236932452015-07-28T00:03:56.831-07:002015-07-28T00:03:56.831-07:00Also, does it apply to content scripts, background...Also, does it apply to content scripts, background scripts and other extension system scripting notions?PhistucKhttps://www.blogger.com/profile/06666208790643226861noreply@blogger.comtag:blogger.com,1999:blog-2683431904392903776.post-11834803614257572452015-07-27T23:02:42.563-07:002015-07-27T23:02:42.563-07:00It is always great to see more optimizations! Than...It is always great to see more optimizations! Thank you!<br /><br />Is Chrome (Chrome, Chromium, or V8) storing the cached code on disk? If so, is it verifying the integrity of the file?<br />If not, this seems somewhat dangerous.PhistucKhttps://www.blogger.com/profile/06666208790643226861noreply@blogger.comtag:blogger.com,1999:blog-2683431904392903776.post-11675293209479510502015-07-27T23:01:33.481-07:002015-07-27T23:01:33.481-07:00This comment has been removed by the author.PhistucKhttps://www.blogger.com/profile/06666208790643226861noreply@blogger.com