ternary operator vs. if statement (v8)

Revision 8 of this benchmark created on

Setup

var j = 0;
  
  var rmd160_K1_1 = function(j) {
      return (0 <= j && j <= 15) ? 0x00000000 : (16 <= j && j <= 31) ? 0x5a827999 : (32 <= j && j <= 47) ? 0x6ed9eba1 : (48 <= j && j <= 63) ? 0x8f1bbcdc : (64 <= j && j <= 79) ? 0xa953fd4e : "rmd160_K1: j out of range";
  };
  var rmd160_K1_2 = function(j) {
      if (0 <= j && j <= 15) return 0x00000000;
      if (16 <= j && j <= 31) return 0x5a827999;
      if (32 <= j && j <= 47) return 0x6ed9eba1;
      if (48 <= j && j <= 63) return 0x8f1bbcdc;
      if (64 <= j && j <= 79) return 0xa953fd4e;
  };
  var rmd160_K1_3 = function(j) {
      if (0 <= j && j <= 15) return 0x00000000;
      else if (16 <= j && j <= 31) return 0x5a827999;
      else if (32 <= j && j <= 47) return 0x6ed9eba1;
      else if (48 <= j && j <= 63) return 0x8f1bbcdc;
      else if (64 <= j && j <= 79) return 0xa953fd4e;
  };
  var rmd160_K1_4 = function(j) {
      switch (true) {
          case 0 <= j && j <= 15:
              return 0x00000000;
          case 16 <= j && j <= 31:
              return 0x5a827999;
          case 32 <= j && j <= 47:
              return 0x6ed9eba1;
          case 48 <= j && j <= 63:
              return 0x8f1bbcdc;
          case 64 <= j && j <= 79:
              return 0xa953fd4e;
      }
  };

Teardown



            j = Math.random * 80 |0;

Test runner

Ready to run.

Testing in
TestOps/sec
ternary
rmd160_K1_1();
ready
if
rmd160_K1_2();
ready
if-else
rmd160_K1_3();
ready
switch
rmd160_K1_4();
ready

Revisions

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