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JS engine detection with tail recursion #202

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pygy opened this issue Jan 3, 2024 · 0 comments

pygy commented Jan 3, 2024

function detect(){
  "use strict" //necessary for Safari to eliminate tail calls
  function recurse(N) {if (N ===0) return "JavaScriptCore"; else return recurse(N-1)}
  try {return recurse(2**16)} catch(e) {
    if (e instanceof RangeError) return "V8"
    else return "SpiderMonkey" // here, `e instanceof InternalError` is true
  }
}
detect()

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