tree e3def0dcc944e0b54a4610c7d877f6840fda35c6
parent db55efd4bccc863849e396df094b754b31cb7d4b
author Petr Hosek <phosek@google.com> 1592123743 -0700
committer Commit Bot <commit-bot@chromium.org> 1592410540 +0000

Omit stamp when inputs are only used by a single build rule

When a target depends on a multiple inputs, but itself has only a
single build rule, omit the stamp and depend on inputs directly.
While it's not very common to have a target with only single
source file in hand written code, it's pretty common for generated
code such as various bindings, where this optimization can save
significant amount of stamping. For example, in Fuchsia x64.core
build this saves 2351 stamps.

Bug: gn:172
Change-Id: If58241f56bd1ee902b0d32909f0662003fc499ed
Reviewed-on: https://gn-review.googlesource.com/c/gn/+/8960
Reviewed-by: Brett Wilson <brettw@chromium.org>
Commit-Queue: Petr Hosek <phosek@google.com>