tree a4b125f0fea6a1ea57c9a712a2a09b6669bbb5ef
parent 8a1584e77c5c71e98a8cac87e6c5df6ee5d94c63
author Googler <jhorvitz@google.com> 1713362910 -0700
committer Copybara-Service <copybara-worker@google.com> 1713363015 -0700

Use `putIfAbsent()` instead of `get()`/`put()` in `PersistentStringIndexer`.

Doesn't affect memory use, just something I noticed while working on the memory footprint. It's inside of a `synchronized` block, so reducing work is helpful.

PiperOrigin-RevId: 625671056
Change-Id: Id5ee8f9fcc6f3c13bbd060081277d778e333b9ee