Performance Profiling tools

C++ CPU profiling:

gperf

https://code.google.com/p/gperftools/?redir=1

http://goog-perftools.sourceforge.net/doc/cpu_profiler.html

IO profiling in Linux:

http://www.linuxprogrammingblog.com/io-profiling

http://www.cs.princeton.edu/picasso/mats/mats_S07/Lucifredi_Lecture_Feb07.pdf

Valgrinds:

Callgrind, 

Cachegrind

 

Java script Profiling:

https://github.com/spy-js/spy-js

cachegrind
http://wwwcdf.pd.infn.it/valgrind/cg_main.html

why cpu matters,
http://www.roguewave.com/DesktopModules/Bring2mind/DMX/Download.aspx?entryid=1134&command=core_download&PortalId=0&TabId=607

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