perf: cache the result of thread_current_id() (#4425)

2022-12-20 14:59:02 -06:00 · 2022-12-20 14:59:02 -06:00 · 1e734f36b1
parent ebc93788ce
commit 1e734f36b1
1 changed files with 2 additions and 1 deletions
--- a/libtransmission/session-thread.cc
+++ b/libtransmission/session-thread.cc
@ -107,7 +107,8 @@ int cond_wait(void* vcond, void* vlock, struct timeval const* tv)

 unsigned long thread_current_id()
 {
-    return std::hash<std::thread::id>()(std::this_thread::get_id());
+    thread_local auto const hashed = std::hash<std::thread::id>()(std::this_thread::get_id());
+    return hashed;
 }

 void initEvthreadsOnce()