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Ran 14 Oct 2015 04:10PM UTC

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Committed 14 Oct 2015 04:10PM UTC coverage: 94.707% (+0.4%) from 94.32%

Job # TERM=dumb

Build Type

push

travis-ci

Committed by

ben-manes

Commit Message

Restore write performance

When rewriting the put() for correctness with zero weights, there were
major performance hits.

1. The loss of a fast-path to mimic a read when the update did not
require extra policy handling (e.g. replace with same weight). This
improved performance to 33% - 50% of the prior version.

2. The use of compute() to perform an mutation is slower than a get()
and requires creating a lambda (heap, not stack allocated). These two
reduce performance significantly, but cannot be worked around directly.
Instead they are only required for correctness of weights, which is not
the common case. The fix is then to use specialized put() methods
depending on if a custom weigher is used.

Coverage Stats

4151 of 4383 relevant lines covered (94.71%)

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