Hi Darrel, I would like to understand what is going on here. Would it be possible for you to create a reduced test case that exhibits the problem? Create a standalone C++ application using V8 in the way that you do in your code and check if it has the issue that you mention here?
Thanks, -- Mads On Wed, Jan 27, 2010 at 5:27 PM, darrel karisch <[email protected]> wrote: > I have been working on a POC that centers on Javascript and I chose > chromium as the driver and development base. > > in this POC many small scripts may be executed in different contexts > and/or the same context multiple times depending on input data > (scripts may invoke other scripts indirectly through object methods). > The same script set may be reexecuted multiple times indirectly > depending on user input cues. > > In my initial implementation I reuse the object from > ScriptData::PreCompile to facilitate faster compilation when > required. This design functions and performs quite well. > > I have updated my code base from chromium version 21525 of mid-July to > version 35622 to take advantage of the "new context-independent script > objects that can be run in any number of contexts" as described in > Christian Plesner's announcement from August 17 New v8 API functions > http://groups.google.com/group/v8-users/index/browse_frm/thread/d31782722fe19f2c?_done=%2Fgroup%2Fv8-users%2Fbrowse_frm%2Fthread%2Fd31782722fe19f2c%3Fpli%3D1%26&pli=1. > > With this new functionality in place I refactored the codebase > discontinuing use of ScriptData and instead reusing Scripts as > described in the announcement. > > I notice that version 35622 executes significantly slower than the > prior version. I'm profiling a slow degradation in performance with > each passing reexecution of the same code. i.e. reexecuting the same > Script instance set in memory. correspondingly, the executable memory > usage exhibits a slow continuous increase. upon reloading the JS > source the memory usage resets and the issue repeats. > > using my prior code base that creates new Scripts with ScriptData with > each invocation, I am experiencing the same slow degradation in > performance with the newer release. > > my version 21525 implementation does not exhibit this behavior. > > has anyone else noticed this? can you speculate on the source of this > behavior? please tell me what more info you may need to make an > assessment. > > -- > v8-users mailing list > [email protected] > http://groups.google.com/group/v8-users > -- v8-users mailing list [email protected] http://groups.google.com/group/v8-users
