How to check execution time of a code block

B Vinoth Raj
Jan 20, 2022

During development you may oftentimes come across the need to check execution time for a code block.

Two console functions make this job easy:

console.time("some label")  
// some code
console.timeEnd("some label")  

The following example illustrates:

console.time("time taken");

var arr = new Array(1000),
    len = arr.length,
    i;

for (i = 0; i < len; i++) {
    arr[i] = new Object();
};

console.timeEnd("time taken"); 

// Example output:
time taken: 0.178955078125 ms

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