Run results for: lookup table vs switch

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser: Chrome 131

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 4 months ago

Test name	Executions per second
lookup	451355.0 Ops/sec
switch	2911729.2 Ops/sec

Tests:

lookup

const SOURCE = [
  'hello', 'hi', 'bye', 'die',
  'die', 'bye', 'hi', 'hello',
  'hello', 'hi', 'bye', 'die',
  'die', 'bye', 'hi', 'hello',
  'hello', 'hi', 'bye', 'die',
  'die', 'bye', 'hi', 'hello',
  'hello', 'hi', 'bye', 'die',
  'die', 'bye', 'hi', 'hello',
  'hello', 'hi', 'bye', 'die',
  'die', 'bye', 'hi', 'hello',
  'hello', 'hi', 'bye', 'die',
  'die', 'bye', 'hi', 'hello',
  'hello', 'hi', 'bye', 'die',
  'die', 'bye', 'hi', 'hello',
  'hello', 'hi', 'bye', 'die',
  'die', 'bye', 'hi', 'hello',
  
];

let a;

var LOOKUP = {
  "ahello": function(v) {
    a = (v + "\n\n" + "hi");
  },
  "ahi": function(v) {
    a = (v + "\n\n" + "hello");
  },
  "abye": function(v) {
    a = (v + "\n\n" + "no");
  },
  "adie": function(v) {
    a = (v + "\n\n" + "you shot me");
  },

  "bhello": function(v) {
    a = (v + "\n\n" + "hi");
  },
  "bhi": function(v) {
    a = (v + "\n\n" + "hello");
  },
  "bbye": function(v) {
    a = (v + "\n\n" + "no");
  },
  "bdie": function(v) {
    a = (v + "\n\n" + "you shot me");
  },
  
  "hello": function(v) {
    a = (v + "\n\n" + "hi");
  },
  "hi": function(v) {
    a = (v + "\n\n" + "hello");
  },
  "bye": function(v) {
    a = (v + "\n\n" + "no");
  },
  "die": function(v) {
    a = (v + "\n\n" + "you shot me");
  },
};

for(let value of SOURCE){ LOOKUP[value](value)}

​x
 
const SOURCE = [  'hello', 'hi', 'bye', 'die',  'die', 'bye', 'hi', 'hello',  'hello', 'hi', 'bye', 'die',  'die', 'bye', 'hi', 'hello',  'hello', 'hi', 'bye', 'die',  'die', 'bye', 'hi', 'hello',  'hello', 'hi', 'bye', 'die',  'die', 'bye', 'hi', 'hello',  'hello', 'hi', 'bye', 'die',  'die', 'bye', 'hi', 'hello',  'hello', 'hi', 'bye', 'die',  'die', 'bye', 'hi', 'hello',  'hello', 'hi', 'bye', 'die',  'die', 'bye', 'hi', 'hello',  'hello', 'hi', 'bye', 'die',  'die', 'bye', 'hi', 'hello',  ];​let a;​var LOOKUP = {  "ahello": function(v) {    a = (v + "\n\n" + "hi");  },  "ahi": function(v) {    a = (v + "\n\n" + "hello");  },  "abye": function(v) {    a = (v + "\n\n" + "no");  },  "adie": function(v) {    a = (v + "\n\n" + "you shot me");  },​  "bhello": function(v) {    a = (v + "\n\n" + "hi");  },  "bhi": function(v) {    a = (v + "\n\n" + "hello");  },  "bbye": function(v) {    a = (v + "\n\n" + "no");  },  "bdie": function(v) {    a = (v + "\n\n" + "you shot me");  },    "hello": function(v) {    a = (v + "\n\n" + "hi");  },  "hi": function(v) {    a = (v + "\n\n" + "hello");  },  "bye": function(v) {    a = (v + "\n\n" + "no");  },  "die": function(v) {    a = (v + "\n\n" + "you shot me");  },};​for(let value of SOURCE){ LOOKUP[value](value)}

switch

const SOURCE = [
  'hello', 'hi', 'bye', 'die',
  'die', 'bye', 'hi', 'hello',
  'hello', 'hi', 'bye', 'die',
  'die', 'bye', 'hi', 'hello',
  'hello', 'hi', 'bye', 'die',
  'die', 'bye', 'hi', 'hello',
  'hello', 'hi', 'bye', 'die',
  'die', 'bye', 'hi', 'hello',
  'hello', 'hi', 'bye', 'die',
  'die', 'bye', 'hi', 'hello',
  'hello', 'hi', 'bye', 'die',
  'die', 'bye', 'hi', 'hello',
  'hello', 'hi', 'bye', 'die',
  'die', 'bye', 'hi', 'hello',
  'hello', 'hi', 'bye', 'die',
  'die', 'bye', 'hi', 'hello',
  
];

let a;
for(let value of SOURCE){
  switch (value) {
    case "ahello":
      a = (value + "\n\n" + "hi");
    case "ahi":
      a = (value + "\n\n" + "hello");
    case "abye":
      a = (value + "\n\n" + "no");
    case "adie":
      a = (value + "\n\n" + "you shot me");
    case "bhello":
      a = (value + "\n\n" + "hi");
    case "bhi":
      a = (value + "\n\n" + "hello");
    case "bbye":
      a = (value + "\n\n" + "no");
    case "bdie":
      a = (value + "\n\n" + "you shot me");
    case "hello":
      a = (value + "\n\n" + "hi");
    case "hi":
      a = (value + "\n\n" + "hello");
    case "bye":
      a =(value + "\n\n" + "no");
    case "die":
      a = (value + "\n\n" + "you shot me");
  }
}

 
const SOURCE = [  'hello', 'hi', 'bye', 'die',  'die', 'bye', 'hi', 'hello',  'hello', 'hi', 'bye', 'die',  'die', 'bye', 'hi', 'hello',  'hello', 'hi', 'bye', 'die',  'die', 'bye', 'hi', 'hello',  'hello', 'hi', 'bye', 'die',  'die', 'bye', 'hi', 'hello',  'hello', 'hi', 'bye', 'die',  'die', 'bye', 'hi', 'hello',  'hello', 'hi', 'bye', 'die',  'die', 'bye', 'hi', 'hello',  'hello', 'hi', 'bye', 'die',  'die', 'bye', 'hi', 'hello',  'hello', 'hi', 'bye', 'die',  'die', 'bye', 'hi', 'hello',  ];​let a;for(let value of SOURCE){  switch (value) {    case "ahello":      a = (value + "\n\n" + "hi");    case "ahi":      a = (value + "\n\n" + "hello");    case "abye":      a = (value + "\n\n" + "no");    case "adie":      a = (value + "\n\n" + "you shot me");    case "bhello":      a = (value + "\n\n" + "hi");    case "bhi":      a = (value + "\n\n" + "hello");    case "bbye":      a = (value + "\n\n" + "no");    case "bdie":      a = (value + "\n\n" + "you shot me");    case "hello":      a = (value + "\n\n" + "hi");    case "hi":      a = (value + "\n\n" + "hello");    case "bye":      a =(value + "\n\n" + "no");    case "die":      a = (value + "\n\n" + "you shot me");  }}