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Pros: we are seeing a 10% performance boost for all python processes. Cons: The time to build python increases. This is because pgo (profile guided optimizations) need the unit tests for python to be invoked and then the entire package compiled a second time using the timing information from the unit test profiling data that is gathered. This commit sets up the src rpm environment for building python 2.7.5 - Needed to disable the tox unit test check phase since a couple tests fail due to build dependencies - Turn off dtrace and systemtap in the spec file - Use pgo for build in modules: https://bugs.python.org/issue26307 - Rollup cpython patches and add --enable-optimizations and --with-computed-gotos for optimized build These are the cpython commits pulled in: 4ff151a72a3331c514924a5e0d33747a91413fbd (Sept 18, 2015 pgo) c543a0fc3b2052c35fced09e1f96613625723508 (Jun 2 2016) (lto) 6d8fdfc84b8617476f3f497e93e9e7b6cecc5474 (Sept 8 2016) 794b2912acc1995afc6fe9501cc0ca8e56565325 (Sept 8 2016) b9999158545f3bc089b926086daa666b8e4c7caa (Nov 20) 2016 6a04ef7ceddae0930eba6cc57ba2ebfcef00abab Mar 28 2017 This still does not yield the same level of performance as a vanilla python 2.7.14 source tree which suggests there are other commits that would provide a performance boost. Change-Id: Iaddf7ead672412ad1878217ddcfaf88c9b0e2443 Signed-off-by: Al Bailey <Al.Bailey@windriver.com> |
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