intel - File smaller => Compilation time longer? -

intel - File smaller => Compilation time longer? -

i've got old c files, written in 1999 older. there useless parts of code because of new programming techniques. i've got problem.

the original file => 640 lines --> 0.448 seconds the new file => 581 lines --> 0.493 seconds

i have utilize intel c++ compiler version 10 o3 optimisations. compiler configuration not customizable except options , flags in compilation line.

this difference of time between original , new file insignificant, when extrapolated 5000 files, adds up.

i don't think fault of compiler.

edit clarification

i have optimize compilation time of lots of c files. these files contain lots of old code useless (#if 0, preprocessor code...). in order remove things, created python script examines of files , removes undesirable pieces of code.

the patch works well. removes code want. compilation time increases. don't understand why.

edit #2

my patch removes part of code removed preprocessor #if 0, , merging loops. 15 loops 1 line , same max worst 1 loop 15 lines inside. made lots of tests on big file (70000 lines) , save 60% of original compilation time. don't add together complexity or other operations. it's code purge.

intel compilation-time