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- Subject: Re: Custom Lua Binary Sizes
- From: Sean Conner <sean@...>
- Date: Fri, 5 Jan 2018 21:48:19 -0500
It was thus said that the Great Paige DePol once stated:
>
> For embedded systems the parser/lexer could just be left out, obviously this
> would require all necessary Lua code be pre-compiled (another good reason
> for adding cross-platform bytecode genereration to 'luac' in my opinion). I
> was also wondering if people who embed Lua precompile the source or not?
I finally have some time, so I thought I might check the sizes of Lua
source code, compressed Lua source code [1], compiled Lua code and
compressed compiled Lua code, for both 32 bit and 64 bit systems (and yes,
there is a difference in compiled Lua sizes). I used LuaRocks beacuse it
was
a) handy
b) a good mix of module sizes
c) all in Lua.
Attached is the full output from a 32-bit run and a 64-bit run, but let's
look at a small sample of the output.
Here we have sizes from a 32-bit system.
text ztext bin zbin filename
-----------------------------------------
4167 1479 6107 2647 add.lua
3267 1207 4830 2137 admin_remove.lua
15750 4229 17277 6352 build.lua
11312 2888 15600 5552 builtin.lua
2178 886 2637 1196 cmake.lua
932 389 1023 487 command.lua
You can see that the compiled versions are larger than the text. And the
same holds true for the compressed versions. Next up, results from a 64-bit
test:
text ztext bin zbin filename
-----------------------------------------
4167 1479 6723 2669 add.lua
3267 1207 5322 2163 admin_remove.lua
15750 4229 18889 6442 build.lua
11312 2888 17416 5638 builtin.lua
2178 886 2917 1211 cmake.lua
932 389 1123 495 command.lua
Again, similar results, only the 64-bit compiled versions are larger than
the 32-bit compiled versions. The trick here is to determine if the size
savings of compression are worth the extra cost of zlib support. There's
also the question of whether the reduction in Lua size of removing the
parser is worth the larger size of pre-compiled Lua code.
-spc (Trade-offs, trade-offs)
[1] Using zlib (lzlib module for Lua) with maximum compression. I used
maximum compression because I figure take the hit on time for
compression on more powerful machines to save space on less powerful
machines one might embed Lua in.
text ztext bin zbin filename
-----------------------------------------
4167 1479 6107 2647 add.lua
3267 1207 4830 2137 admin_remove.lua
15750 4229 17277 6352 build.lua
11312 2888 15600 5552 builtin.lua
2178 886 2637 1196 cmake.lua
932 389 1023 487 command.lua
3417 1141 3357 1337 make.lua
2858 894 3738 1571 cache.lua
24477 6885 25939 9963 cfg.lua
7108 2440 9249 3903 command_line.lua
1973 745 2677 1212 config_cmd.lua
28517 7227 25819 9141 deps.lua
2570 957 2208 857 dir.lua
5059 1586 7219 3013 doc.lua
3409 1202 4281 1884 download.lua
15275 3871 15081 5314 fetch.lua
1832 755 2171 1007 cvs.lua
3570 1392 3880 1680 git.lua
792 403 588 324 git_file.lua
1143 571 597 326 git_http.lua
357 219 198 134 git_https.lua
1382 650 763 391 git_ssh.lua
2098 833 2474 1105 hg.lua
1004 510 575 317 hg_http.lua
346 216 196 134 hg_https.lua
340 215 194 136 hg_ssh.lua
1840 830 1999 982 sscm.lua
2140 847 2725 1239 svn.lua
2139 869 3272 1404 fs.lua
28208 7156 30616 10290 lua.lua
5310 1869 6169 2422 tools.lua
4697 1661 4924 2048 unix.lua
7808 2258 9341 3175 tools.lua
9289 3063 9954 3641 win32.lua
7615 2160 8347 2751 tools.lua
4593 1660 5825 2437 help.lua
5492 1976 7468 3260 index.lua
7272 1967 8235 2939 install.lua
1527 694 1737 884 lint.lua
3323 1078 4498 1882 list.lua
9690 2992 7972 3024 loader.lua
3831 1436 4392 1944 make.lua
1871 754 2383 1117 make_manifest.lua
24069 5285 25293 7852 manif.lua
4153 1283 3603 1375 manif_core.lua
6292 1964 7052 2960 new_version.lua
7043 2101 8466 3271 pack.lua
14996 3091 15816 3837 path.lua
2268 762 2677 1101 path_cmd.lua
6883 2014 6275 2559 persist.lua
2614 966 3821 1700 purge.lua
1061 452 1388 716 refresh_cache.lua
6594 2026 8136 3195 remove.lua
17202 4044 19286 5928 repos.lua
108 92 182 123 require.lua
18429 4609 18559 6303 search.lua
5636 1726 7906 3090 show.lua
492 213 630 349 site_config.lua
22010 5650 23476 8374 patch.lua
4804 1420 6588 2485 tar.lua
8683 2114 9252 3017 zip.lua
11511 2891 8778 3470 type_check.lua
6135 1758 6459 2487 unpack.lua
3014 1057 3944 1828 upload.lua
8674 2577 12772 5115 api.lua
2800 1052 4562 1963 multipart.lua
23374 7126 22830 8546 util.lua
4622 1310 7288 2707 validate.lua
12284 3664 16503 6592 write_rockspec.lua
text ztext bin zbin filename
-----------------------------------------
4167 1479 6723 2669 add.lua
3267 1207 5322 2163 admin_remove.lua
15750 4229 18889 6442 build.lua
11312 2888 17416 5638 builtin.lua
2178 886 2917 1211 cmake.lua
932 389 1123 495 command.lua
3417 1141 3689 1355 make.lua
2858 894 4150 1592 cache.lua
24477 6885 28519 10102 cfg.lua
7108 2440 10153 3953 command_line.lua
1973 745 2941 1235 config_cmd.lua
28517 7227 28451 9265 deps.lua
2570 957 2488 875 dir.lua
5059 1586 7951 3051 doc.lua
3409 1202 4749 1909 download.lua
15275 3871 16581 5385 fetch.lua
1832 755 2403 1021 cvs.lua
3570 1392 4256 1705 git.lua
792 403 656 330 git_file.lua
1143 571 669 334 git_http.lua
357 219 210 133 git_https.lua
1382 650 847 396 git_ssh.lua
2098 833 2730 1120 hg.lua
1004 510 643 323 hg_http.lua
346 216 208 133 hg_https.lua
340 215 206 135 hg_ssh.lua
1840 830 2223 997 sscm.lua
2140 847 3013 1253 svn.lua
2139 869 3640 1426 fs.lua
28208 7156 33960 10461 lua.lua
5310 1869 6853 2461 tools.lua
4697 1661 5472 2085 unix.lua
7808 2258 10465 3220 tools.lua
9289 3063 11090 3698 win32.lua
7615 2160 9287 2796 tools.lua
4593 1660 6333 2471 help.lua
5492 1976 8172 3300 index.lua
7272 1967 8991 2980 install.lua
1527 694 1921 896 lint.lua
3323 1078 5010 1909 list.lua
9690 2992 8896 3073 loader.lua
3831 1436 4712 1966 make.lua
1871 754 2627 1130 make_manifest.lua
24069 5285 27989 7961 manif.lua
4153 1283 3995 1399 manif_core.lua
6292 1964 7620 2995 new_version.lua
7043 2101 9342 3322 pack.lua
14996 3091 17564 3891 path.lua
2268 762 2853 1111 path_cmd.lua
6883 2014 6975 2595 persist.lua
2614 966 4221 1734 purge.lua
1061 452 1528 725 refresh_cache.lua
6594 2026 9008 3241 remove.lua
17202 4044 21294 6018 repos.lua
108 92 194 122 require.lua
18429 4609 20519 6396 search.lua
5636 1726 8670 3135 show.lua
794 299 1093 491 site_config.lua
22010 5650 25584 8469 patch.lua
4804 1420 7212 2519 tar.lua
8683 2114 10100 3062 zip.lua
11511 2891 9642 3520 type_check.lua
6135 1758 7079 2521 unpack.lua
3014 1057 4268 1850 upload.lua
8674 2577 14168 5198 api.lua
2800 1052 5082 1997 multipart.lua
23374 7126 25382 8678 util.lua
4622 1310 8064 2750 validate.lua
12284 3664 18127 6686 write_rockspec.lua
