digitalmars.D.bugs - [Issue 16489] New: [backend][optimizaton][registers] DMD is 10-20
- via Digitalmars-d-bugs (23/23) Sep 12 2016 https://issues.dlang.org/show_bug.cgi?id=16489
https://issues.dlang.org/show_bug.cgi?id=16489 Issue ID: 16489 Summary: [backend][optimizaton][registers] DMD is 10-20 times slower for GLAS Product: D Version: D2 Hardware: All OS: All Status: NEW Severity: major Priority: P1 Component: dmd Assignee: nobody puremagic.com Reporter: ilyayaroshenko gmail.com Small static arrays should be allocated in registers if possible [2]. Currently DMD loads and stores values of static array each time. Currently DMD is 10-20(!) times slower for GLAS matrix multiplication then LDC. This is the largest DMD BE problem for GLAS [1]. [1] http://docs.mir.dlang.io/latest/mir_glas_l3.html [2] https://github.com/libmir/mir/blob/v0.17.0-alpha0/source/mir/glas/internal/gemm.d#L360 Related Issue: https://issues.dlang.org/show_bug.cgi?id=16488 --
Sep 12 2016