So for a while now fpc 3.3.1 receives new optimizations => which is
great / big fan of it.
And hence I thought, lets see how much of an impact they have. And in my
test, they had none :(
Wondering if any one else has measured them?
My tests:
Win-10 64 bit
3.3.1 905c485ff413cd48f98891e2075c814759d0c6f1
3.2.3 2022-02-04
both compilers with each O2 and O4
Using the testcase for FpDebug (which runs a decent spread of code).
Testcase with O2 and O3
And I got no noticeable difference.
I also tried {$CodeAlign proc=32 loop=32} for O2 (test and fpc), also no
diff.
O2 / fpc: o2 323
TestWatchesValue_fpc 264_Dwarf_32Bit_FpDebug : 22.406
TestWatchesValue_fpc 264_Dwarf_32Bit_FpDebug : 22.063
TestWatchesValue_fpc 264_Dwarf_32Bit_FpDebug : 22.609
O2 / fpc: o2 331
TestWatchesValue_fpc 264_Dwarf_32Bit_FpDebug : 22.251
TestWatchesValue_fpc 264_Dwarf_32Bit_FpDebug : 22.031
TestWatchesValue_fpc 264_Dwarf_32Bit_FpDebug : 21.531
O3 / fpc: o2 323
TestWatchesValue_fpc 264_Dwarf_32Bit_FpDebug : 22.687
TestWatchesValue_fpc 264_Dwarf_32Bit_FpDebug : 22.281
TestWatchesValue_fpc 264_Dwarf_32Bit_FpDebug : 22.469
O3 / fpc: o2 331
TestWatchesValue_fpc 264_Dwarf_32Bit_FpDebug : 23.203
TestWatchesValue_fpc 264_Dwarf_32Bit_FpDebug : 22.250
TestWatchesValue_fpc 264_Dwarf_32Bit_FpDebug : 22.140
O3 / fpc: o4 323
TestWatchesValue_fpc 264_Dwarf_32Bit_FpDebug : 23.063
TestWatchesValue_fpc 264_Dwarf_32Bit_FpDebug : 22.250
TestWatchesValue_fpc 264_Dwarf_32Bit_FpDebug : 22.875
O3 / fpc: o4 331
TestWatchesValue_fpc 264_Dwarf_32Bit_FpDebug : 22.577
TestWatchesValue_fpc 264_Dwarf_32Bit_FpDebug : 22.094
TestWatchesValue_fpc 264_Dwarf_32Bit_FpDebug : 22.235
{$CodeAlign proc=32 loop=32}
O2 / fpc: def 323
TestWatchesValue_fpc 264_Dwarf_32Bit_FpDebug : 22.453
TestWatchesValue_fpc 264_Dwarf_32Bit_FpDebug : 22.328
TestWatchesValue_fpc 264_Dwarf_32Bit_FpDebug : 22.656
O2 / fpc: def 331
TestWatchesValue_fpc 264_Dwarf_32Bit_FpDebug : 22.079
TestWatchesValue_fpc 264_Dwarf_32Bit_FpDebug : 22.234
TestWatchesValue_fpc 264_Dwarf_32Bit_FpDebug : 21.984
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