[autoroll] cache commit_metadata operations.

[autoroll] cache commit_metadata operations.

These metadata operations happen hundreds or thousands of times (
quadratically more for each potential roll candidate). Caching them should
reduce the amount of time for the recipe roller to do its job.

R=dnj@chromium.org, nodir@chromium.org, phajdan.jr@chromium.org
BUG=

Review-Url: https://codereview.chromium.org/2761673007
Committed: https://github.com/luci/recipes-py/commit/fb61dcf4145be9d98f85d02af72a498f09782800

[iannucci, 2017-03-20 23:12:50]

The CQ bit was checked by iannucci@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2017-03-20 23:12:55]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-03-20 23:16:04]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-03-20 23:16:05]

Dry run: This issue passed the CQ dry run.

[nodir, 2017-03-20 23:30:55]

lgtm

[iannucci, 2017-03-20 23:32:14]

The CQ bit was checked by iannucci@chromium.org

[commit-bot: I haz the power, 2017-03-20 23:32:15]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-03-20 23:35:28]

CQ is committing da patch.

Bot data: {"patchset_id": 20001, "attempt_start_ts": 1490052734013130,
"parent_rev": "803d6ead998b4bbca601fb3a984e76ddc063806d", "commit_rev":
"fb61dcf4145be9d98f85d02af72a498f09782800"}

[commit-bot: I haz the power, 2017-03-20 23:35:31]

Description was changed from

==========
[autoroll] cache commit_metadata operations.

These metadata operations happen hundreds or thousands of times (
quadratically more for each potential roll candidate). Caching them should
reduce the amount of time for the recipe roller to do its job.

R=dnj@chromium.org, nodir@chromium.org, phajdan.jr@chromium.org
BUG=
==========

to

==========
[autoroll] cache commit_metadata operations.

These metadata operations happen hundreds or thousands of times (
quadratically more for each potential roll candidate). Caching them should
reduce the amount of time for the recipe roller to do its job.

R=dnj@chromium.org, nodir@chromium.org, phajdan.jr@chromium.org
BUG=

Review-Url: https://codereview.chromium.org/2761673007
Committed:
https://github.com/luci/recipes-py/commit/fb61dcf4145be9d98f85d02af72a498f097...
==========

[commit-bot: I haz the power, 2017-03-20 23:35:31]

Committed patchset #2 (id:20001) as
https://github.com/luci/recipes-py/commit/fb61dcf4145be9d98f85d02af72a498f097...