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.
Sergei
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