How to optimize backend performance fast?

Start with APM traces and DB profiling. Fix N+1 and indexes first—80% wins.

What tools profile Python backends?

cProfile for code, django-debug-toolbar local, Datadog APM prod.

Averages hide user pain. p99 catches the 1% killing retention.

Averages lie. Your backend's p99 latency tells the real story—and it's probably worse than you think. Here's the data-driven playbook to fix it.

DevTools Feed Apr 03, 2026 3 min read 12 views

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#backend performance #latency optimization #observability #profiling tools

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Originally reported by dev.to