9449
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Ran 16 Mar 2016 05:40PM UTC

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Build # 9449

Build Type

push

travis-ci

Committed by

peiyuwang

Commit Message

[engine] turn off pickle memoization

I ran into the same issue in https://rbcommons.com/s/twitter/r/3494/ that Stu had earlier in https://rbcommons.com/s/twitter/r/3498

It's due to by default pickle memorizes what has been pickled by ids, which means same object
is not going to be pickled again, (A, A) has less space than (A, A'), A equals A'. For us,
content addressability is based on equality. We need (A, A) to be identical to (A, A').

Switch to `fast` mode turns off memorization. Long term we still need
https://github.com/pantsbuild/pants/issues/2969. `Fast` is undocumented in 2 and deprecated
in 3 https://docs.python.org/3/library/pickle.html (there might be a equivalent way in 3)

Testing Done:
Ran ./pants test tests/python/pants_test/engine/exp/::
Started https://travis-ci.org/peiyuwang/pants/builds/116415180

Reviewed at https://rbcommons.com/s/twitter/r/3574/

Coverage Stats

Jobs

ID	Job ID	Ran
1	9449.1 (CI_FLAGS="-cjlpn 'Various pants self checks'")	16 Mar 2016 05:49PM UTC	Travis Job 9449.1
4	9449.4 (CI_FLAGS="-fkmsrcjlpa 'Python contrib tests'")	16 Mar 2016 05:51PM UTC	Travis Job 9449.4
5	9449.5 (CI_FLAGS="-fkmsrjlpn -i 0/6 'Python integration tests for pants - shard 1'")	16 Mar 2016 05:40PM UTC	Travis Job 9449.5
6	9449.6 (CI_FLAGS="-fkmsrjlpn -i 1/6 'Python integration tests for pants - shard 2'")	16 Mar 2016 05:54PM UTC	Travis Job 9449.6
7	9449.7 (CI_FLAGS="-fkmsrjlpn -i 2/6 'Python integration tests for pants - shard 3'")	16 Mar 2016 05:52PM UTC	Travis Job 9449.7
8	9449.8 (CI_FLAGS="-fkmsrjlpn -i 3/6 'Python integration tests for pants - shard 4'")	16 Mar 2016 05:52PM UTC	Travis Job 9449.8
9	9449.9 (CI_FLAGS="-fkmsrjlpn -i 4/6 'Python integration tests for pants - shard 5'")	16 Mar 2016 06:05PM UTC	Travis Job 9449.9

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