tree 12dfee19c75b341fad4a2d8dd745b4631ea89ce0
parent b137071ea03537ac00592a572dc0140fab985c53
author ulfjack <ulfjack@google.com> 1554463591 -0700
committer Copybara-Service <copybara-worker@google.com> 1554463669 -0700

Async {AbstractFileWrite,TemplateExpansion}Action

While the contents of these files have to be evaluated locally, we have
code to write the files to remote storage, which can block the current
thread for at least one network round-trip time. These blocks show up in
the profiler, even though they don't consume any local CPU, making it
more difficult to interpret the results.

This change may improve build performance in cases where Bazel has to
write a lot of such files and also has different actions which could
execute in parallel. However, I did not measure any improvements in the
builds I tested.

Progress on #6394.

PiperOrigin-RevId: 242104204