[Haskell-cafe] Slow mvar when compiled with threaded
branimir.maksimovic at gmail.com
Fri Jan 10 00:13:08 UTC 2014
On 01/10/2014 01:03 AM, Bob Ippolito wrote:
> The bad news is that the fix is to compile it with GHC HEAD (~7.8, I
> built ec4af3f), which has the new Mio high-performance multicore IO
> manager . Apparently the old IO manager wasn't well suited to this
> use case.
> With the latest GHC, the -threaded version outperforms the single
> threaded version, and the numbers for both are better than with GHC 7.6.3.
Thanks. Glad to hear that!
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