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From: =?iso-8859-1?Q?Michael_Gr=F8nager?= <gronager@ceptacle.com>
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Date: Thu, 15 Dec 2011 18:18:09 +0100
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Subject: [Bitcoin-development] CDataStream
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OK, I admit that this is *really* of little importance...=20
But could someone with commit rights please update the CDataStream test =
table in the code. The arguments for the custom stream are just way off =
(stringstream wins by factor 10-20!). On OS X (g++) I get:
Further, if you get(got) bad stringstream numbers on e.g. windows =
(dikumware had some issues several years ago) you can improve just by =
changing the default allocation chunk size. So... speed is not a reason =
for reimplementing stringstream. (And perhaps this can motivate someone =
to revert bitcoin to stringstream ;-)
Cheers,
Michael
PS: Could be fun to see the output on other OS'es !
serialize.h (with TESTCDATASTREAM defined, =
i686-apple-darwin11-llvm-g++-4.2 (GCC) 4.2.1 (Based on Apple Inc. build =
5658) (LLVM build 2336.1.00)):
CDataStream:
n=3D1000 0 seconds
n=3D2000 0 seconds
n=3D4000 0 seconds
n=3D8000 0 seconds
n=3D16000 0 seconds
n=3D32000 0 seconds
n=3D64000 1 seconds
n=3D128000 1 seconds
n=3D256000 2 seconds
n=3D512000 4 seconds
n=3D1024000 8 seconds
n=3D2048000 17 seconds
n=3D4096000 40 seconds
stringstream:
n=3D1000 0 seconds
n=3D2000 0 seconds
n=3D4000 0 seconds
n=3D8000 0 seconds
n=3D16000 0 seconds
n=3D32000 0 seconds
n=3D64000 0 seconds
n=3D128000 0 seconds
n=3D256000 0 seconds
n=3D512000 0 seconds
n=3D1024000 0 seconds
n=3D2048000 1 seconds
n=3D4096000 2 seconds
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