tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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function-var-environment.js (1018B)

      1 function defaultValue() { return 123; }
      2 
      3 // 2 environment objects: Call => Var. The lambda uses both of them.
      4 function testBasic(p = defaultValue()) {
      5    for (var i = 0; i < 2000; i++) {}
      6    return () => i + p;
      7 }
      8 assertEq(testBasic()(), 2123);
      9 
     10 function testBailout(p = defaultValue()) {
     11    for (var i = 0; i < 2000; i++) {
     12        if (i > 1950) {
     13            bailout();
     14        }
     15    }
     16    return () => i + p;
     17 }
     18 assertEq(testBailout()(), 2123);
     19 
     20 // 3 environment objects: Call => Var => Lexical. The lambda uses all of them.
     21 let escaped;
     22 function testVarAndLexical(p = defaultValue()) {
     23    var q = p + 1;
     24    let i = 0;
     25    for (; i < 2000; i++) {
     26        escaped = () => i + p + q;
     27    }
     28 }
     29 testVarAndLexical();
     30 assertEq(escaped(), 2247);
     31 
     32 function testVarAndLexicalBailout(p = defaultValue()) {
     33    var q = p + 1;
     34    let i = 0;
     35    for (; i < 2000; i++) {
     36        escaped = () => i + p - q;
     37        if (i > 1950) {
     38            bailout();
     39        }
     40    }
     41 }
     42 testVarAndLexicalBailout();
     43 assertEq(escaped(), 1999);