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bug#15294: 24.3.50; js2-mode parser is several times slower in lexical-b
From: |
Stefan Monnier |
Subject: |
bug#15294: 24.3.50; js2-mode parser is several times slower in lexical-binding mode |
Date: |
Wed, 18 Sep 2013 19:48:48 -0400 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.3.50 (gnu/linux) |
I now have a tentative patch which introduces new bytecodes for
"catch" which avoid the need to create closures for
lexical-binding code.
Current results:
- dynbind old-bytecode: 0.84s
- dynbind new-bytecode: 0.83s
- lexbind old-bytecode: 2.14s
- lexbind new-bytecode: 0.67s
Of course, code compiled with the new bytecodes won't run on
non-bleeding edge Emacs.
On my "standard test" (i.e. time to recompile all the emacs/lisp files),
the new bytecodes make no measurable difference, so `catch' doesn't seem
to be used very much there.
Similar changes would be welcome for condition-case and
unwind-protect, and since adding new bytecodes is something I'd rather
not do too often (and since there aren't many unused bytecodes left),
I'll try to get a complete patch first to make sure I don't have to
change my mind and use different byte codes.
Stefan
- bug#15294: 24.3.50; js2-mode parser is several times slower in lexical-binding mode, (continued)
- bug#15294: 24.3.50; js2-mode parser is several times slower in lexical-binding mode, Dmitry Gutov, 2013/09/14
- bug#15294: 24.3.50; js2-mode parser is several times slower in lexical-binding mode, Stefan Monnier, 2013/09/14
- bug#15294: 24.3.50; js2-mode parser is several times slower in lexical-binding mode, Dmitry Gutov, 2013/09/14
- bug#15294: 24.3.50; js2-mode parser is several times slower in lexical-binding mode, Stefan Monnier, 2013/09/15
- bug#15294: 24.3.50; js2-mode parser is several times slower in lexical-binding mode, Richard Stallman, 2013/09/15
bug#15294: 24.3.50; js2-mode parser is several times slower in lexical-binding mode, Dmitry Gutov, 2013/09/14
bug#15294: 24.3.50; js2-mode parser is several times slower in lexical-binding mode,
Stefan Monnier <=