tree db0717a7f90d588243994b56d4bb206be31cc9a2
parent 7f6f9c12adefe8130565b7425dc387d284c009e4
author Abseil Team <absl-team@google.com> 1681235666 -0700
committer Copybara-Service <copybara-worker@google.com> 1681235711 -0700

Fix FunctionMocker compilation slowdown in 9d21db9e0a60a1ea61ec19331c9bc0dd33e907b1

The slowdown appears to be due to an implicit conversion of distinct (yet semantically identical) lambdas to `std::function`. Lifting out the lambdas into functors that don't get re-instantiated reduces compilation times by nearly half.

Fixes #4156

PiperOrigin-RevId: 523447948
Change-Id: Ib0ae0761a54d7b1f2b706b14b2858eedf47e2297