On 2016-09-30 16:45, Erik Joelsson wrote:
A while back, we introduced the JAVA_SMALL configuration in the build,
which improved build performance and reduced resource usage for
several small java instances. However, it was never fully applied to
all command lines where it would fit.
I have looked through the entire build and measured performance with
the current "BIG" configuration vs the "SMALL" one. In all cases, the
small config won, especially when measuring total user time, but also
for wall clock time. The total impact on a full build is of course
small, since we already hit the low hanging fruit previously, but it's
still nice to take this optimization all the way.
On my Linux workstation, I save about 3 minutes of user time and a few
seconds of wall clock. On a macpro, 2 minutes of user time and a few
seconds of wall clock.
Bug: https://bugs.openjdk.java.net/browse/JDK-8166965
Webrev: http://cr.openjdk.java.net/~erikj/8166965/webrev.01
Looks good to me. Thanks for continuing to improve performance!
Just a few questions:
* I can't see how the changes in MainSupport.gmk fits in. Is that a
separate issue you fixed?
* Where do we have the "big" configuration? The module compilations?
Elsewhere?
/Magnus
