Created
March 4, 2020 01:06
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Calculate Memory Size of a JS Object
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function memorySizeOf(obj) { | |
var bytes = 0; | |
function sizeOf(obj) { | |
if (obj !== null && obj !== undefined) { | |
switch (typeof obj) { | |
case "number": | |
bytes += 8; | |
break; | |
case "string": | |
bytes += obj.length * 2; | |
break; | |
case "boolean": | |
bytes += 4; | |
break; | |
case "object": | |
var objClass = Object.prototype.toString.call(obj).slice(8, -1); | |
if (objClass === "Object" || objClass === "Array") { | |
for (var key in obj) { | |
if (!obj.hasOwnProperty(key)) continue; | |
sizeOf(obj[key]); | |
} | |
} else bytes += obj.toString().length * 2; | |
break; | |
} | |
} | |
return bytes; | |
} | |
function formatByteSize(bytes) { | |
if (bytes < 1024) return bytes + " bytes"; | |
else if (bytes < 1048576) return (bytes / 1024).toFixed(3) + " KiB"; | |
else if (bytes < 1073741824) return (bytes / 1048576).toFixed(3) + " MiB"; | |
else return (bytes / 1073741824).toFixed(3) + " GiB"; | |
} | |
return formatByteSize(sizeOf(obj)); | |
} |
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