> Peter Vreman wrote: >> >> I gave the patch a quick try and the speed stays the same for compiling the >> compiler sources. >> Can >> you explain how you did measure the performance gain? >> > First, I compiled the compiler using -gl switch in order to have > procedure names in logs. > Then I compiled a project (it was my working copy of > packages/fcl-xml/tests/xmlts.pp) using callgrind: > > valgrind --tool=callgrind ppc386 -S2h -dRELEASE -gl xmlts.pp > > Finally, annotated the log: > > callgrind_annotate --tree=calling >file.txt > > As a result, you get a file with call tree and execution times for most > procedures. The numbers are very consistent across multiple runs. > I observed decrease in "Program totals" number (I actually don't know > what it is - CPU instructions, ticks or something arbitrary): from > 410,867,243 to 302,717,628. > > I suspect that these numbers do not include time spent by kernel in disk > i/o procedures, and that kernel time may be so high that it masks out > all improvements. Also, I compiled a program with all used units already > compiled, so in my case .ppu creation was not covered. > But anyway, smaller numbers should be better than bigger ones.
Below are the number that i get when i compiled fppkg from r9259. These show only 3% improvement. But also small bits help and i'll apply the patches after some cleanups. Old compile all units: ==4852== I refs: 1,649,289,307 Old PPU Load: ==4862== I refs: 513,954,604 New compile all units: ==4280== I refs: 1,634,900,650 New PPU load: ==4290== I refs: 496,248,276 Peter _______________________________________________ fpc-devel maillist - fpc-devel@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-devel
