How to reduce WASM build size?

[paulocoutinhox]

Hi,

I made a new empty project with Axmol and build with WASM to see final build size.

It has around 47-50 MB for empty project.

There is a way to reduce it? I already disabled all extensions in CMake and it reduce from 50MB to 47MB.

Thanks.

[paulocoutinhox]

Will be nice have a way to remove not used libraries to make it small enought to web platforms:

https://www.linkedin.com/feed/update/urn:li:activity:7364165399703142403?commentUrn=urn%3Ali%3Acomment%3A%28activity%3A7364165399703142403%2C7364277546143698944%29&replyUrn=urn%3Ali%3Acomment%3A%28activity%3A7364165399703142403%2C7364416348380114945%29&dashCommentUrn=urn%3Ali%3Afsd_comment%3A%287364277546143698944%2Curn%3Ali%3Aactivity%3A7364165399703142403%29&dashReplyUrn=urn%3Ali%3Afsd_comment%3A%287364416348380114945%2Curn%3Ali%3Aactivity%3A7364165399703142403%29

[AlexandreK38]

@paulocoutinhox For 2 games I'm able to have the Wasm file near 5MB, and another 10MB.
Note that many extensions are disabled

# DISABLE UNUSED FEATURES

set(AX_ENABLE_PHYSICS OFF CACHE BOOL "Build physic support" FORCE)
set(AX_ENABLE_3D OFF CACHE BOOL "Build 3D support" FORCE)
set(AX_ENABLE_3D_PHYSICS OFF CACHE BOOL "Build Physics3D support" FORCE)
set(AX_ENABLE_NAVMESH OFF CACHE BOOL "Build NavMesh support" FORCE)
set(AX_ENABLE_CONSOLE OFF CACHE BOOL "console support" FORCE)
set(AX_ENABLE_MEDIA OFF CACHE BOOL "Media support" FORCE)
set(AX_ENABLE_MFMEDIA OFF CACHE BOOL "MF Media support" FORCE)
set(AX_ENABLE_VLC_MEDIA OFF CACHE BOOL "Vlc support" FORCE)
set(AX_ENABLE_OPUS OFF CACHE BOOL "Opus support" FORCE)

# EXTENSIONS

set(AX_ENABLE_EXT_SPINE OFF CACHE BOOL "Build extension spine" FORCE)
set(AX_ENABLE_EXT_COCOSTUDIO OFF CACHE BOOL "Build extension cocostudio" FORCE)
set(AX_ENABLE_EXT_FAIRYGUI OFF CACHE BOOL "Build extension FairyGUI" FORCE)
set(AX_ENABLE_EXT_ASSETMANAGER OFF CACHE BOOL "Build extension asset-manager" FORCE)
set(AX_ENABLE_EXT_PARTICLE3D OFF CACHE BOOL "Build extension Particle3D" FORCE)
set(AX_ENABLE_EXT_LUA OFF CACHE BOOL "Build lua libraries" FORCE)
set(AX_ENABLE_EXT_DRAGONBONES OFF CACHE BOOL "Build extension DragonBones" FORCE)
set(AX_ENABLE_EXT_GUI OFF CACHE BOOL "Build extension GUI" FORCE)
set(AX_ENABLE_EXT_PHYSICS_NODE OFF CACHE BOOL "Build extension Physics nodes" FORCE)
set(AX_ENABLE_EXT_JSONDEFAULT OFF CACHE BOOL "Build extension Json Default" FORCE)
set(AX_ENABLE_EXT_IMGUI OFF CACHE BOOL "Build extension ImGui Default" FORCE)
set(AX_ENABLE_EXT_INSPECTOR OFF CACHE BOOL "Build extension Inspector Default" FORCE)
set(AX_ENABLE_EXT_SDFGEN OFF CACHE BOOL "Build extension SDFGen Default" FORCE)

Also I add set(CMAKE_INTERPROCEDURAL_OPTIMIZATION TRUE) in the CMakeList.txt

The packed resources into .data file also count for the initial download size, unless you start the game without any images before downloading assets in the loading screen and from another source

[paulocoutinhox]

Strange, i put all this and only down to 37MB +/-:

[AlexandreK38]

Strange, it's an empty project?

[paulocoutinhox]

Yes, i created with "axmol new empty-demo -l cpp". I don't change nothing. Only build it.

[halx99]

try axmol -p wasm -O3 to build without debug information

[paulocoutinhox]

Perfect, is this - 2,2MB.

[AlexandreK38]

I use the option -xb '--config','Release' that's probably O3 or O2 too

[paulocoutinhox]

I tried with Release but it go to 50MB

axmol build -p wasm -xb --config Release

[paulocoutinhox]

My mistake, i put without the quotes.

It make a similar version with -O3

Thanks.