tree 8452e20266e1724b922573afec4c9853315f9048
parent 1a40c422ff4cba78398da516b99c400c314f66d0
author Derek Murray <mrry@google.com> 1588114910 -0700
committer TensorFlower Gardener <gardener@tensorflow.org> 1588115268 -0700

[RunHandler] Minor optimizations to environment variable handling.

1. Avoid re-evaluating the "TF_RUN_HANDLER_USE_SUB_THREAD_POOL" environment variable each time a task is enqueued, by caching the result in a static local variable.
2. A similar optimization in `ChooseRequestsWithExponentialDistribution()`.
3. Since all the arguments are string literals, we can pass `const char*` to the `ParamFromEnv*WithDefault()` methods, to avoid creating a temporary `std::string` on each call.

PiperOrigin-RevId: 308915732
Change-Id: I1642b5d924477eb006497acf95ac7cfc17956feb