tree cf58e1347bbffe9f8f075820fbfdcccff43bb561
parent 18d8e6dca7d74c240aabf9f44eea540ae565efb2
author Takuto Ikuta <tikuta@google.com> 1771496011 +0900
committer GN LUCI <gn-scoped@luci-project-accounts.iam.gserviceaccount.com> 1771501721 -0800

Optimize HeaderChecker::IsDependencyOf using HashTableBase

This improved performance of `gn gen --check` from 55.7s to 21.7s on my
M4 Max macbook as memory allocation in unordered_map seems slow on
macOS.

Bug: 484862257
Change-Id: I688c316c72938087d65ad5487f554b10665a29e3
Reviewed-on: https://gn-review.googlesource.com/c/gn/+/21120
Commit-Queue: Takuto Ikuta <tikuta@google.com>
Reviewed-by: David Turner <digit@google.com>