the performance of IO manager in GHC 7.10.1rc2

Hi, As usual, I took benchmark of IO manager to check if preformance regression is introduced. Fortunately, I don't see any preformance regression. +RTS -N<x> 1 2 4 8 16 --------------------------------------------------------- GHC7.8.4 81,413 153,478 270,178 406,448 50,3203 GHC7.10.1rc2 88,247 148,471 265,392 409,514 49,3890 Environment: two real 20 cores machines directly connected by 20G - Xeon E5-2650Lv2 (1.70GHz/10cores/25MB) x 2, 8GM, no HT - CentOS 7.0 - Two 10Gs are aggregated Server: witty -a -m -r 8080 +RTS -A32m -N<x> Benchmark: weighttp -n 100000 -c 1000 -k -t 16 http://<ip-addr>/ P.S. If Ben's patch will be included in GHC 7.10, I will try this again. --Kazu