Updating shard maps for perf bots

[Wenbin Zhang]

Hi all,

I'm updating the shard maps for all perf builders. After some efforts to reduce the runtime on perf bots, now we're seeing some shards are running much longer than average. Resharding will resolve this issue.

Tracking bug: https://bugs.chromium.org/p/chromium/issues/detail?id=1129958

The consequence of this change is that some stories/benchmarks will start running on a different shard after this change. This can cause the performance metrics for these stories/benchmarks to change, but it does not indicate an actual improvement or a regression. If you find a regression, and pinpoint is unable to find a culprit, and this CL is in the blame-list, then it is possible that the change is caused by this remapping of the shards. It should be OK to ignore such regressions.

Please let me know if you have concerns etc.