View source for Performance:Tools/oprofile

= Profiling Firefox or Fennec with oprofile =

oprofile is a useful profiling tool for Linux. Using it does not require recompiling in many cases, which is nice.

* You may need to compile with
   ac_add_options --enable-optimize="-O0 -fno-omit-frame-pointer"
in order to get callgraph data properly.
* You can then follow the following workflow:
   sudo opcontrol --reset
   sudo opcontrol --no-vmlinux
   sudo opcontrol --start --callgraph=10
   [... do stuff ...]
   sudo opcontrol --shutdown
   opreport --demangle=smart --symbols --callgraph ./fennec `ls *.so` &> o ; gedit o

== Notes ==

* Callgraph data may not work on x86_64, sadly.