> +// REQUIRES: long_tests
I got curious as to why this was slow. I ran perf on
./bin/clang -E @..../response-file.c.tmp.1.txt response-file.c -###
The results are interesting
39.24% clang clang-3.6 [.]
llvm::opt::Option::matches(llvm::opt::OptSpecifier) const
▒
25.58% clang clang-3.6 [.]
llvm::opt::Option::Option(llvm::opt::OptTable::Info const*,
llvm::opt::OptTable const*) ▒
14.84% clang clang-3.6 [.]
llvm::opt::OptTable::getOption(llvm::opt::OptSpecifier) const
▒
1.68% clang libc-2.18.so [.] strlen
Now, there are 300_000 options in the response file, but adding a
counter to ] llvm::opt::Option::matches shows that it is called about
349_802_000 times :-)
Is this a now issue? Is it worth fixing?
Cheers,
Rafael
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