Build minimum size ChakraCore for embedding?

[tommyZZM]

default ChakraCore size uses over 41.7mb size, can i make it smaller?

[obastemur]

41.7? Is that the .a file ? It gets smaller after linker. You may also do ‘strip -x’ to ditch debug symbols.

++
@curtisman had added a smaller binary option that should help further. IIRC that option needs to be enabled with build.sh/CMake for *nix. I will look at that.

[tommyZZM]

reply @obastemur

41.7 is the size of chakracore for macOS (a binary name ch) that i download from the release page (https://github.com/Microsoft/ChakraCore/releases),

in embedding project, .a file got even larger, nearly 250mb

[obastemur]

@tommyZZM makes sense. That’s not stripped nor optimized for size.

[obastemur]

BTW; we include ICU + stdlibc++ embedded into ch and .so in order to make things easy for end users.

++ strip -x reduces extra ~6Mb.. IIRC ChakraCore related part should be around ~20 .

[rhuanjl]

If Unicode support is not required running the build script with the --no-icu option shrinks it a lot (around 16mb).

[liminzhu]

You can also build without JIT if you want the bare minimum. Trade-off here is obviously performance.

@obastemur @curtisman what's the flag for that again?

[digitalinfinity]

I don't think the build flags are exposed nicely through build.sh but the flag needed is CHAKRACORE_LITE - you can define it in CommonDefines.h or also perhaps also in CFLAGS/CXXFLAGS. I haven't tested the latter though.

See #3553 for details

[obastemur]

build.sh supports turning of JIT and disabling ICU. --no-jit --no-icu yet CHAKRACORE_LITE comes with additional perks those I've been planning to enable via build.sh.

We need to merge #4285 first

[liminzhu]

// cc @curtisman

Lite mode seems very useful that we should document it perhaps in Building ChakraCore.

I did #define CHAKRACORE_LITE in CommonDefines.h and made a x64 release build from today's master but I only see the binary size go down from 6663kb to 6014kb. Am I missing anything?

[curtisman]

#define is not enough, because it also disable JIT and ScriptDebug in the project files.

On windows build, pass /p:BuildLite=true to msbuild to build Lite mode.

Latest master x64 binary size:
Default: 6.71MB
Lite: 3.16MB

We need to do a little work for Linux build to enable Lite mode.
I believe it need to add the NoScriptDebug build and have lite build to turn off both JIT and ScriptDebug in additional to defining CHAKRACORE_LITE.