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| author | Quincey Koziol <koziol@hdfgroup.org> | 2003-11-07 20:21:45 (GMT) |
|---|---|---|
| committer | Quincey Koziol <koziol@hdfgroup.org> | 2003-11-07 20:21:45 (GMT) |
| commit | 1716cab24b78f7cdd0590da2b30a35320af9456b (patch) | |
| tree | b53873ebdd1b17edabecbc90bb90aed14437cb89 /release_docs | |
| parent | 9bd97b4496fa2159289bb7b2b789b2c46473244b (diff) | |
| download | hdf5-1716cab24b78f7cdd0590da2b30a35320af9456b.zip hdf5-1716cab24b78f7cdd0590da2b30a35320af9456b.tar.gz hdf5-1716cab24b78f7cdd0590da2b30a35320af9456b.tar.bz2 | |
[svn-r7825] Purpose:
Code optimization
Description:
Improved integer & floating-point datatype conversions by removing some
corner cases. Got rid of algorithm which walked the buffer of elements to
convert backwards, switching to algorithm which computes the non-overlapping
space in the buffer and repeatedly converts it in the forward direction.
Platforms tested:
FreeBSD 4.9 (sleipnir)
h5committest
Cray SV1 & T3E (T90 is not accessible)
Diffstat (limited to 'release_docs')
| -rw-r--r-- | release_docs/RELEASE.txt | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/release_docs/RELEASE.txt b/release_docs/RELEASE.txt index 7a14a4c..decb346 100644 --- a/release_docs/RELEASE.txt +++ b/release_docs/RELEASE.txt @@ -77,6 +77,8 @@ Bug Fixes since HDF5-1.6.1 release Performance ------------- + - More optimizations to inner loops of datatype conversions for + integers and floats which give a 10-50% speedup. QAK - 2003/11/07 - Hoisted invariant 'if/else's out of inner datatype conversion loop for integer and floating-point values, giving about a 20% speedup. QAK - 2003/10/20 |