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master: 97%

Ran 09 May 2016 11:01PM UTC

Files 10

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Committed 09 May 2016 11:00PM UTC coverage: 96.703%. Remained the same

Job # 175.1

Build Type

push

travis-ci

Committed by

akshayjshah

Commit Message

Add a sampling wrapper (#36)

* Add a spy logger

* Add a sampling wrapper

* Rebase on master

* Reset sampler counters each tick

Use the runtime's timer heap to manage a tick interval for sampling
loggers, but make sure that we don't put anything on the heap until we
start dropping logs. This should keep the non-sampled path fast, and
allow the sampled path to actually shed work.

* Make spy.New return the logger and the sink

* Sample by call site

* Bucket logs by message instead of call site

From my benchmarks, `runtime.Callers` is suprisingly expensive. It's
actually quite a bit cheaper to maintain a separate bucket for each
message, since hashing small-ish strings is quite fast.

* Benchmark sampling with a variety of messages

* Less string hashing

* Travis is very, very slow

* Comments from CR

Run Details

440 of 455 relevant lines covered (96.7%)

13706.14 hits per line

uber-common / zap / 175 / 1
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master: 97%

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uber-common / zap / 175 / 1 97% master: 97%

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uber-common / zap / 175 / 1
97%
master: 97%

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