[Mono-dev] Big performance gaps between .NET, Mono (Suse/Debian) ?

Chuck Esterbrook chuck.esterbrook at gmail.com
Tue Oct 6 12:36:59 EDT 2009

A web search showed me that GC can be turned off with the environment
variable GC_DONT_GC. Maybe that should be called MONO_GC_ON. In any
case, any value will turn off the GC, including blank, so to turn it
back on, unset it.

I tested with a command line Mono program that is not a
microbenchmark. With GC, it peaks at around 180MB and without, it
peaks around 840MB and runs about 18% faster. I gave the same program
less work to do and its performance boost was only 10%.

So now you can try your programs without GC to see how much it
contributes to performance drag. Just watch for swap.  :-)

Does anyone know what's involved with plugging in your own GC into Mono?


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