[erlang-questions] io_lib:format R16B03 performance and jsx impact

Dmitry Kolesnikov <>
Tue Jan 28 09:52:34 CET 2014


Hello,

I’d like to catch up with potential performance issue with io_lib and jsx at R16B03. 
In the nutshell, the performance of my system is dropped significantly (-50% - 60%) 
when I’ve upgraded from R15B03 to R16B03.

Profiling indicates one pain point with jsx, especially float to json conversion. 
io_lib:format("~p", [Float])

I’ve get rid of floats to integers and issue is gone.  

- Dmitry


More information about the erlang-questions mailing list