Recipe 16.4

Using Console Timers

To start a timer, call console.time with a name for your timer. Later, when the task you are timing has completed, call console.timeEnd with the same timer name. It will stop the timer and print the elapsed time to the console along with its name.

Code

JavaScript

// Start the `loadTransactions` timer
console.time('loadTransactions');

// Load some data
const data = await fetch('/api/users/123/transactions');

// Stop the `loadTransactions` timer
// Prints: "loadTransactions: <elapsed time> ms"
console.timeEnd('loadTransactions');