Created
March 1, 2018 08:01
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calculate memory size of javascript object, it is not a accurate value!
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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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