try out re2c --bit-vectors

oils-for-unix / oils

Oils is our upgrade path from bash to a better language and runtime. It's also for Python and JavaScript users who avoid shell!

http://www.oilshell.org/

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try out re2c --bit-vectors #755

Open andychu opened 4 years ago

andychu commented 4 years ago

From https://oilshell.zulipchat.com/#narrow/stream/121539-oil-dev/topic/re2c.20codegen.20options

It should make the code smaller while having no speed penalty?

andychu commented 4 years ago

Current code size:

https://www.oilshell.org/release/0.8.pre4/metrics.wwz/oil-native/overview.txt

We have 30K of code for the lexer, and this could be reduced. But does it increase data size?

                                                             symbols vmsize filesize
1                                              [section .debug_info]      0  2549460
2                                               [section .debug_loc]      0  1726825
3                                               [section .debug_str]      0  1224583
4                                            [section .debug_ranges]      0   415312
5                                              [section .debug_line]      0   231102
6                                                  [section .rodata]  70704    70704
7                                            [section .debug_abbrev]      0    33103
8                                                  match::OneToken()  30463    30539