[fpc-devel] Curious about the effect of all the new optimizations....

[Martin Frb]

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