diff options
| author | Thiago Macieira <thiago.macieira@intel.com> | 2025-01-17 09:40:17 -0800 |
|---|---|---|
| committer | Thiago Macieira <thiago.macieira@intel.com> | 2025-01-23 18:09:38 -0800 |
| commit | 39564261b213b22a7e170baf4528d125260b5436 (patch) | |
| tree | 7607fd7031db02b8dc0d0945359e568d093bb1a6 /src | |
| parent | 918566aeddbbf56f8539c44bcd45223d2fbab996 (diff) | |
QThread/Linux: disable the filling in of the trivial cpuset variable
We don't need it and it just makes the code slower with a large array.
Change-Id: I06dfa436309bfd249c06fffddb4cec658cf356a9
Reviewed-by: Ahmad Samir <a.samirh78@gmail.com>
Reviewed-by: Marc Mutz <marc.mutz@qt.io>
Diffstat (limited to 'src')
| -rw-r--r-- | src/corelib/thread/qthread_unix.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/corelib/thread/qthread_unix.cpp b/src/corelib/thread/qthread_unix.cpp index f8bf4ba63c9..0a907511d80 100644 --- a/src/corelib/thread/qthread_unix.cpp +++ b/src/corelib/thread/qthread_unix.cpp @@ -489,6 +489,11 @@ Qt::HANDLE QThread::currentThreadIdImpl() noexcept int QThreadPrivate::idealThreadCount = 1; #endif +#if QT_CONFIG(trivial_auto_var_init_pattern) && defined(Q_CC_GNU_ONLY) +// Don't pre-fill the automatic-storage arrays used in this function +// (important for the FreeBSD & Linux code using a VLA). +__attribute__((optimize("trivial-auto-var-init=uninitialized"))) +#endif int QThread::idealThreadCount() noexcept { int cores = 1; |