Run results for: Bench fast-json-patch vs microdiff

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/139.0.0.0 Safari/537.36

Browser: Chrome 139

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

FAST JSON-patch

1.0M/s

microdiff

231K/s

View exact numbers

Test name	Executions per second
✓ FAST JSON-patch	1,034,179 Ops/sec
microdiff	230,503 Ops/sec

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/npm/fast-json-patch@3.1.1/dist/fast-json-patch.min.js"></script>
<script>
  // Add this in your benchmark setup code
function diff(t,e,r={cyclesFix:!0},s=[]){
  const richTypes={Date:!0,RegExp:!0,String:!0,Number:!0};
  let a=[];
  const c=Array.isArray(t);
  for(const i in t){
    const o=t[i],n=c?+i:i;
    if(!(i in e)){a.push({type:"REMOVE",path:[n],oldValue:t[i]});continue}
    const p=e[i],y="object"==typeof o&&"object"==typeof p&&Array.isArray(o)===Array.isArray(p);
    !(o&&p&&y)||richTypes[Object.getPrototypeOf(o)?.constructor?.name]||r.cyclesFix&&s.includes(o)?o===p||Number.isNaN(o)&&Number.isNaN(p)||y&&(isNaN(o)?o+""==p+"":+o==+p)||a.push({path:[n],type:"CHANGE",value:p,oldValue:o}):a.push.apply(a,diff(o,p,r,r.cyclesFix?s.concat([o]):[]).map((t=>(t.path.unshift(n),t))))
  }
  const i=Array.isArray(e);
  for(const r in e)r in t||a.push({type:"CREATE",path:[i?+r:r],value:e[r]});
  return a
}

// Now you can use 'diff' in your benchmark tests
</script>

Script Preparation code:

obj1= {
        name: "Argentina",
        cities: [
        {
            name: 'Buenos Aires',
            population: 13028000,
        },
        {
            name: 'Cordoba',
            population: 1430023,
        },
        {
            name: 'Rosario',
            population: 1136286,
        },
        {
            name: 'Mendoza',
            population: 901126,
        },
        {
            name: 'San Miguel de Tucuman',
            population: 800000,
        }
        ]
    };
    
obj2= {
        name: "Argentina",
        cities: [
        {
            name: 'Cordoba',
            population: 1430023,
        },
        {
            name: 'Mendoza',
            population: 901126,
        },
        {
            name: 'San Miguel de Tucuman',
            population: 550000,
        }
        ]
    };

Tests:

microdiff
var diff1 = diff(obj1, obj2); /*var objnew = jsonpatch.deepClone(obj1); // jsondiffpatch.unpatch(objnew, diff1);*/
FAST JSON-patch
var diff3 = jsonpatch.compare(obj1, obj2); /*var objnew = jsonpatch.deepClone(obj1); jsonpatch.applyPatch(objnew, diff3, false, true);*/