| commit | 9933b3078f35be0198dc37d1b0d914797c5802d7 | |
| author | Jan Moringen <jmoringe@techfak.uni-bielefeld.de> | |
| Sun, 15 Nov 2015 14:38:14 +0000 (15 15:38 +0100) | ||
| committer | Jan Moringen <jmoringe@techfak.uni-bielefeld.de> | |
| Sun, 29 Nov 2015 00:16:32 +0000 (29 01:16 +0100) | ||
| tree | 1f6885a0be3b5a811c902dc81033f09137dfd96d | treesnapshot (tar.gz zip) |
| parent | 9d81610e5fbdb506f905d3c235c8f665a2bd15bd | commitdiff |
Avoid calling SUBTYPEP in ANSI-STREAM-{READ,WRITE}-SEQUENCE
* For short sequences, the SUBTYPEP call could easily be responsible for
30 % of the time spent in {READ,WRITE}-SEQUENCE.
* We avoid this by, when the stream is created, coarsely characterizing
the stream element-type into the four categories that matter for
{READ,WRITE}-SEQUENCE: CHARACTER subtype, [UN]SIGNED-BYTE subtype or
bivalent.
* For short sequences, the SUBTYPEP call could easily be responsible for
30 % of the time spent in {READ,WRITE}-SEQUENCE.
* We avoid this by, when the stream is created, coarsely characterizing
the stream element-type into the four categories that matter for
{READ,WRITE}-SEQUENCE: CHARACTER subtype, [UN]SIGNED-BYTE subtype or
bivalent.
| NEWS | diffblobblamehistory | |
| src/code/fd-stream.lisp | diffblobblamehistory | |
| src/code/stream.lisp | diffblobblamehistory |