Cherry-pick #14421 to 7.x: Improve hash performance on Prometheus collector #14639
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* Improve hash performance on Prometheus collector * Update auditbeat to use cespare/xxhash * Fixing build (cherry picked from commit d5bfe6b)
kaiyan-sheng
approved these changes
Nov 21, 2019
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Cherry-pick of PR #14421 to 7.x branch. Original message:
Running a profile of metricbeat revealed that we are spending good chunk of time in the prometheus collector metricset on doing
MapStr.String()which in turn does JSON encoding. This PR generates hashes using XXHash which has documented performance gains.