tree 6bf4c0f1de2eb07dbbaa5c5dc25e172c0b6fbfd2
parent 2c3beac5f748c8eb581c14de5a2769a08762f0e8
author David 'Digit' Turner <digit@google.com> 1637851189 +0100
committer Commit Bot <commit-bot@chromium.org> 1638550629 +0000

Introduce TargetSet type

Handling sets of target pointers is a very performance-critical
operation in GN, and this is currently being done by instances
of the std::set<const Target*> type, which is slow and memory
hungry.

This CL introduces the TargetSet type as an alias to
std::set<const Target*>, and updates the source code to use it.

A future CL will change the TargetSet implementation to a better
one after this one.

Change-Id: I6e01a14d4de2d238818c8c9dd963cda5cf9e66b8
Reviewed-on: https://gn-review.googlesource.com/c/gn/+/12581
Commit-Queue: David Turner <digit@google.com>
Reviewed-by: Brett Wilson <brettw@chromium.org>