[Monotone-devel] performance profiling

[Sebastian Spaeth]

I know that msh is about to improve this, but just for the archive and FYI:

I tried oprofile to get *some* idea where CPU cycles go, so I pulled a
fresh monotone database. (I'll set up my own mirror soon to reduce the
strain on off.net)

The result:

monotone: [bytes in: 22.6M] [bytes out: 624.4k] [certs in: 6965] [revs
in: 2441]
real    32m17.546s
user    27m58.065s
sys     0m11.042s


samples  %        symbol name
8063048  31.5207  CryptoPP::Deflator::LongestMatch(unsigned int&) const
2182601   8.5324  CryptoPP::Deflator::ProcessBuffer()
1401468   5.4787  CryptoPP::LowFirstBitWriter::PutBits(unsigned long,
unsigned int)
1190379   4.6535  CryptoPP::Deflator::EncodeBlock(bool, unsigned int)
988320    3.8636  CryptoPP::BaseN_Encoder::Put2(unsigned char const*,
unsigned int, int, bool)
586569    2.2931  CryptoPP::Deflator::FillWindow(unsigned char const*,
unsigned int)

Interesting that we call LongestMatch 8mio times for 22Mb received data.
sounds a lot. Does anybody know how oprofile can tell me how much time
was spend in these functions?

Spaetz