[OpenJDK 2D-Dev] sun.java2D.Pisces renderer Performance and Memory enhancements

Phil Race philip.race at oracle.com
Wed Apr 17 21:06:17 UTC 2013

 > whereas on Windows / Mac it is client compiler (c1).

For Mac we only have a 64 bit VM which SFAIK should be c2 as well,
yet in that case native was presumably still faster. So its also a matter
of factoring in how good the code is that is generated by the C compiler.


On 4/17/2013 1:26 PM, Richard Bair wrote:
>>     Also, this is with the Java version, right? 
>> Yes, my patch is pure java given as webrev:
>> http://jmmc.fr/~bourgesl/share/java2d-pisces/webrev-1/ 
>> <http://jmmc.fr/%7Ebourgesl/share/java2d-pisces/webrev-1/>
>>     We got a decent 2x speedup in FX by porting the version of Open
>>     Pisces that you started with to C code (all except on Linux where
>>     we couldn't find the right gcc options to make it faster than
>>     Hotspot).  So, we have yet to investigate a native version in the
>>     JDK which might provide even more gains… 
> Oleg did more analysis on this and it appears the reason hotspot on 
> Linux was faster than the C version was because on Linux it is -server 
> compiler (c2) whereas on Windows / Mac it is client compiler (c1). 
> Possibly using -server on windows / mac would also have hotspot 
> beating the C version, although that hasn't been tested.
> Richard

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