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If your Node.js code is littered with console.log statements are you inviting performance issues? Is it worth debug/production toggling this on/off? I realized logging is important to prod in general - but I'm generally curious if the console output has a performance hit?
In Chrome it definitely seems to degrade performance if the console is open.
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It greatly effects performance. I just did a test with console. log with 60,000 keys in my GAMES object. Then, simply did a for in to check if a property exists while console logging the GAMES object before checking.
console. log by itself doesn't really impact performance in a way that you'll notice unless you bind it to a scroll / resize handler. These get called alot and if your browser has to send text to the console like 30/60x a second it can get ugly.
console.log calls in nodejs are synchronous(!) and block the event loop. I just experienced that when I logged the results from executing (asynchronous) sql queries with pg. Logging only 20 items and their (few) properties decreased the performance from 3ms to 300ms on my local machine.
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