JSC is very slow when using cryptography

[sirpy]

Question

When using javascript based crypto libraries such as hdkey (uses crypto.createHmac) performance is very low generating 10 addresses with hdkey takes about 1.8 seconds with latest JSC. for comparison: bundled JSC around 4 sec react-native-v8 without JIT also around 4 sec ios simulator 100mili react-native-v8 with JIT 200mili

Maybe the jsc-bundle is not really configured for JIT? any other explanation for the slow runtime on JSC?

[newyankeecodeshop]

What version of JSC are you using? Some versions of 241213 had JIT completely turned off.

[sirpy]

i've tried the packaged version with 0.61 and the latest npm jsc-android the packaged version is 4 seconds latest npm is 1.8 seconds where can i see the JIT flag?

[Kudo]

JSC has four tiers of JIT executions. (Reference from https://webkit.org/blog/9329/a-new-bytecode-format-for-javascriptcore/)

• Low Level Interpreter (LLInt): the start-up interpreter
• Baseline JIT: a template JIT
• DFG JIT: a low-latency optimizing compiler
• FTL JIT: a high-throughput optimizing compiler

For balancing between resource usage and performance, we only enable LLInt and Baseline JIT. If you would like to check the build flags, here it is

[sirpy]

thanks! i'll try these

[khoanguyen-yang]

Hi @Kudo, @sirpy

So if we want to enable all the JITs, we just simply need to set DENABLE_DFG_JIT=ON and DENABLE_FTL_JIT=ON?

[sirpy]

@sirpy I dont recall the results or if I was able to build and use JSC with JIT. We are still using v8, so I guess it still has the best performance