qjs test.js
Complex Computation took 158 milliseconds
Result: -681.7596643536854

 qjsc -o test_compiled test.js
./test_compiled
Complex Computation took 157 milliseconds
Result: -681.7596643536854

Complex Computation took 109 milliseconds
Result: -681.7596643536841
Total time (including parsing) with no JIT: 152 ms

Complex Computation took 22 milliseconds
Result: -681.7596643536841
Total time (including compilation) with JIT: 22 ms

Complex Computation took 20.40000009536743 milliseconds
complex_test.html:31 Result: -681.7596643536885

Complex Computation took 9.85891 milliseconds
Result: -681.76

sudo apt update

sudo apt install -y build-essential cmake

git clone https://github.com/bellard/quickjs.git
cd quickjs

make

sudo make install

git clone https://chromium.googlesource.com/chromium/tools/depot_tools.git
echo 'export PATH="$PATH:$HOME/depot_tools"' >> ~/.bashrc
source ~/.bashrc

mkdir v8
cd v8
fetch v8
cd v8

git checkout main
gclient sync
tools/dev/v8gen.py x64.release.sample
ninja -C out.gn/x64.release.sample v8_monolith