chore(core): Optimize size of WASM library

[ermshiperete]

Related-to: #11293

[ermshiperete]

From slack:

eberhard 4-DEC 2024
In standup you mentioned the .wasm file on master being 8M. Where do you see that? I don't see a Core API related .wasm file. The only file I see is util_normalize_table_generator.wasm which is 3.8M.

marc
It's the src/libkeymancore.a file that is generated -- a WASM library:

$ ls -l core/build/wasm/release/src/
total 11464
-rw-r--r-- 1 marc 197609 7532488 Dec  4 13:13 libkeymancore.a

Admittedly being a lib file it's bigger than the final linked wasm will be, but it's a sign of bloat 🙂

eberhard
Here's the content of the .a file:

==> (lesspipe 2.12) use archive_file:contained_file to view a file in the archive
rw-r--r-- 0/0  29425 Jan  1 01:00 1970 km_core_action_api.cpp.o
rw-r--r-- 0/0 157130 Jan  1 01:00 1970 km_core_context_api.cpp.o
rw-r--r-- 0/0 244289 Jan  1 01:00 1970 km_core_keyboard_api.cpp.o
rw-r--r-- 0/0 152073 Jan  1 01:00 1970 km_core_options_api.cpp.o
rw-r--r-- 0/0 369196 Jan  1 01:00 1970 km_core_state_api.cpp.o
rw-r--r-- 0/0  27306 Jan  1 01:00 1970 km_core_debug_api.cpp.o
rw-r--r-- 0/0  81443 Jan  1 01:00 1970 km_core_processevent_api.cpp.o
rw-r--r-- 0/0 179749 Jan  1 01:00 1970 action.cpp.o
rw-r--r-- 0/0  34705 Jan  1 01:00 1970 option.cpp.o
rw-r--r-- 0/0 182756 Jan  1 01:00 1970 keyboard.cpp.o
rw-r--r-- 0/0 265964 Jan  1 01:00 1970 state.cpp.o
rw-r--r-- 0/0 147831 Jan  1 01:00 1970 jsonpp.cpp.o
rw-r--r-- 0/0  21433 Jan  1 01:00 1970 .._.._common_cpp_utfcodec.cpp.o
rw-r--r-- 0/0 121405 Jan  1 01:00 1970 actions_normalize.cpp.o
rw-r--r-- 0/0  24686 Jan  1 01:00 1970 context_helpers.cpp.o
rw-r--r-- 0/0 144262 Jan  1 01:00 1970 debuglog.cpp.o
rw-r--r-- 0/0   1403 Jan  1 01:00 1970 vkey_to_contextreset.cpp.o
rw-r--r-- 0/0  79838 Jan  1 01:00 1970 km_core_state_context_set_if_needed.cpp.o
rw-r--r-- 0/0 250000 Jan  1 01:00 1970 util_normalize.cpp.o
rw-r--r-- 0/0 183323 Jan  1 01:00 1970 util_regex.cpp.o
rw-r--r-- 0/0    255 Jan  1 01:00 1970 core_icu.cpp.o
rw-r--r-- 0/0 544489 Jan  1 01:00 1970 ldml_ldml_processor.cpp.o
rw-r--r-- 0/0 1226703 Jan  1 01:00 1970 ldml_ldml_transforms.cpp.o
rw-r--r-- 0/0 368379 Jan  1 01:00 1970 ldml_ldml_markers.cpp.o
rw-r--r-- 0/0 193950 Jan  1 01:00 1970 ldml_ldml_vkeys.cpp.o
rw-r--r-- 0/0 492895 Jan  1 01:00 1970 mock_mock_processor.cpp.o
rw-r--r-- 0/0  22067 Jan  1 01:00 1970 kmx_kmx_consts.cpp.o
rw-r--r-- 0/0 167914 Jan  1 01:00 1970 kmx_kmx_processevent.cpp.o
rw-r--r-- 0/0  26050 Jan  1 01:00 1970 kmx_kmx_actions.cpp.o
rw-r--r-- 0/0  27591 Jan  1 01:00 1970 kmx_kmx_capslock.cpp.o
rw-r--r-- 0/0  92238 Jan  1 01:00 1970 kmx_kmx_context.cpp.o
rw-r--r-- 0/0  23064 Jan  1 01:00 1970 kmx_kmx_conversion.cpp.o
rw-r--r-- 0/0  65865 Jan  1 01:00 1970 kmx_kmx_debugger.cpp.o
rw-r--r-- 0/0 118212 Jan  1 01:00 1970 kmx_kmx_environment.cpp.o
rw-r--r-- 0/0  34092 Jan  1 01:00 1970 kmx_kmx_file.cpp.o
rw-r--r-- 0/0  24702 Jan  1 01:00 1970 kmx_kmx_modifiers.cpp.o
rw-r--r-- 0/0 181526 Jan  1 01:00 1970 kmx_kmx_options.cpp.o
rw-r--r-- 0/0 413633 Jan  1 01:00 1970 kmx_kmx_plus.cpp.o
rw-r--r-- 0/0 548484 Jan  1 01:00 1970 kmx_kmx_processor.cpp.o
rw-r--r-- 0/0 161687 Jan  1 01:00 1970 kmx_kmx_xstring.cpp.o

The biggest chunk is ldml_ldml_transforms.cpp.o with 1.2M, followed by kmx_kmx_processor.cpp.o and ldml_ldml_processor.cpp.o with 540k each.
We probably don't need mock_mock_processor.cpp.o (490k) to be included.
We might want to split this into 3 (or 4) libraries: Core, KMX, LDML (and Mock). That way we can load only what's needed.

[mcdurdin]

Good start on analysis! This will be helpful when we come to the tree-shaking and optimization of the core wasm work, multiple libraries may well be the best way forward.