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Ran 28 Mar 2017 10:35PM UTC

Files 89

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Committed 28 Mar 2017 10:18PM UTC coverage: 92.858% (-0.01%) from 92.87%

Job # PYTHON=2.7 NUMPY=1.10.4 PANDAS=0.19.0 COVERAGE='true' PARALLEL='false' TEST_IMPORTS='false' XTRATESTARGS=

Build Type

push

travis-ci

Committed by

mrocklin

Commit Message

Improve `fuse` performance by allowing tasks to reference old key names that are now aliases. (#2129)

Previously, tasks that depend on fused tasks whose keys were renamed would be
updated via `subs` to use the new task keys.  In some cases, the number of tasks
that depend on fused tasks would greatly outnumber the number of fused tasks,
and calling `subs` on them would dominate the calculation time.

Now, we don't call `subs` on tasks that depend on renamed fused tasks.  These
tasks are no longer modified and use the previous key name, which is now an
alias, `{old_key: new_key}`.  This can result in a larger graph and slightly
more scheduler overhead, but the performance increase to `fuse` can be significant.

Coverage Stats

12261 of 13204 relevant lines covered (92.86%)

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