<AWT Dev> [9] Review Request: 8029253 [macosx] Performance problems with Retina display on Mac OS X

[Sergey Bylokhov]

On 11.06.2014 17:35, Andrew Brygin wrote:
> Hi Sergey,
>
>  could you please clarify why you have eliminated OGLC_VENDOR_SUN?
We have only two bits to store the vendor information, since SUN is not 
used I replace it by INTEL.
>
> Thanks,
> Andrew
>
> On 6/11/2014 5:01 PM, Sergey Bylokhov wrote:
>> Hello.
>> Please review the fix for jdk 9, which is also targeted for jdk 8u20.
>> Description:
>> We have two codepaths to draw a raster to the opengl:
>>  - via glDrawPixels
>>  - via intermediate texture.
>> We empirically checked, what way is better, based on benchmarks. 
>> Became obvious that on intel devices the glDrawPixels is slower than 
>> intermediate texture, and this is a bottleneck when the scrolling is 
>> used.
>>
>> j2bench is not properly cover retina case, but according to some of 
>> my tests results is 2-3 times better.
>>
>> There is no regressions on windows:
>> Summary:
>>   ogl-base:
>>     Number of tests:  60
>>     Overall average:  1452524.357368045
>>     Best spread:      0.17% variance
>>     Worst spread:     248.44% variance
>>     (Basis for results comparison)
>>
>>   ogl-fix:
>>     Number of tests:  60
>>     Overall average:  1469528.5484618822
>>     Best spread:      0.12% variance
>>     Worst spread:     246.59% variance
>>     Comparison to basis:
>>       Best result:      161.48% of basis
>>       Worst result:     93.54% of basis
>>       Number of wins:   38
>>       Number of ties:   17
>>       Number of losses: 5
>>
>> http://cr.openjdk.java.net/~serb/8029253/perf/windows.txt
>>
>> Bug: https://bugs.openjdk.java.net/browse/JDK-8029253
>> Webrev can be found at: 
>> http://cr.openjdk.java.net/~serb/8029253/webrev.00
>>
>


-- 
Best regards, Sergey.