Vercel Founder Warns: console.log Can Slash Server Throughput by 34%

Vercel's Guillermo Rauch highlighted that using console.log in production can reduce server throughput by up to 34% due to timestamp generation and unbuffered writes. A new logger from the srvx project caches timestamps and batches writes, cutting logging overhead by 60-85%. However, buffered writes risk losing logs during a crash, creating a trade-off between performance and reliability.