Re: Performance overhead of virtual methods
Thanks Jason and to the others who responded. Question answered :) On Jan 3, 12:09 pm, Jason Morris lem...@gmail.com wrote: nathan.r.matth...@googlemail.com wrote: Hi GWTers I'm writing some performance sensitive code for GWT. I'm wondering how GWT compilesvirtualfunctions to JavaScript. What's the associated performance overhead? Obviously I'd like to use proper polymorphism but if there's a significant performance overhead it may be worth re- factoring various parts of the code-base. Regards, Nathan Hi Nathan, Someone else can correct me if I'm wrong, but after taking a look at the generated code, it seems thatvirtualmethods shouldn't incur any additional performance overhead in GWT. Basically the bottom level method is given the top-level declared name in each object instance, thus the lookup expense is the same as that of a non-virtualmethod. Like I said, if I'm wrong on this, someone should correct me. ;) Cheers, Jason. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to Google-Web-Toolkit@googlegroups.com To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Re: Performance overhead of virtual methods
nathan.r.matth...@googlemail.com wrote: Hi GWTers I'm writing some performance sensitive code for GWT. I'm wondering how GWT compiles virtual functions to JavaScript. What's the associated performance overhead? Obviously I'd like to use proper polymorphism but if there's a significant performance overhead it may be worth re- factoring various parts of the code-base. Regards, Nathan Hi Nathan, Someone else can correct me if I'm wrong, but after taking a look at the generated code, it seems that virtual methods shouldn't incur any additional performance overhead in GWT. Basically the bottom level method is given the top-level declared name in each object instance, thus the lookup expense is the same as that of a non-virtual method. Like I said, if I'm wrong on this, someone should correct me. ;) Cheers, Jason. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to Google-Web-Toolkit@googlegroups.com To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Re: Performance overhead of virtual methods
Assuming you meant 'virtual' in the C++ sense, then, nothing. On Jan 3, 1:09 pm, Jason Morris lem...@gmail.com wrote: nathan.r.matth...@googlemail.com wrote: Hi GWTers I'm writing some performance sensitive code for GWT. I'm wondering how GWT compiles virtual functions to JavaScript. What's the associated performance overhead? Obviously I'd like to use proper polymorphism but if there's a significant performance overhead it may be worth re- factoring various parts of the code-base. Regards, Nathan Hi Nathan, Someone else can correct me if I'm wrong, but after taking a look at the generated code, it seems that virtual methods shouldn't incur any additional performance overhead in GWT. Basically the bottom level method is given the top-level declared name in each object instance, thus the lookup expense is the same as that of a non-virtual method. Like I said, if I'm wrong on this, someone should correct me. ;) Cheers, Jason. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Google Web Toolkit group. To post to this group, send email to Google-Web-Toolkit@googlegroups.com To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
