Opened 7 years ago
Last modified 7 years ago
#988 new defect
gcc has long compile times for sasmodels
| Reported by: | pkienzle | Owned by: | |
|---|---|---|---|
| Priority: | major | Milestone: | SasView 4.3.0 |
| Component: | SasView | Keywords: | |
| Cc: | Work Package: | SasView Bug Fixing |
Description
Compile time per sasmodels model on gcc is now 10-15 seconds (gcc 4.8.4) compared to 0.2 seconds on clang and 0.33 seconds on tinycc. This slows the travis tests considerably.
Change History (2)
comment:1 Changed 7 years ago by pkienzle
comment:2 Changed 7 years ago by butler
- Milestone changed from SasView 4.2.0 to SasView 4.3.0
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This is due to the use of tgmath.h; compilation with math.h rather than tgmath.h drops the compile time for gcc 4.8.4 down to 0.2 seconds.
Proper handling without tgmath will require using sinf, cosf, … instead of sin, cos, … when running in single precision, which could be done via regular expression substitution.
Single precision is 2-3 times faster than double precision on the CPU.