I work on a really complex debugger at Mozilla but, and don’t tell my colleagues, I sometimes enjoy simply using console.log and other console commands to get some simple output.  I know, I know, but hey — whatever gets the job done.  A few years ago I detailed console.time and console.timeEnd for measuring time for a given set of tasks; let me show you console.timeLog, a new function in Firefox Nightly for logging events during a console.time timer!

Start by kicking off the timer with a name of your choice:


Whenever you want the intermediate timer value, as well as extra information like variable or object values, you can use console.timeLog:

// Same timer name, provide sublabel and optional info

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