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Training Ground · Course

Concurrency

Drill the concurrency a backend service actually runs: fan out and wait, bound the parallelism, cancel on the first error, and keep shared state correct under load. Four drills hand you code that deadlocks, leaks, or drops work, and ask you to fix it.

Pro15lessons✦+75XP~3hest.

Lessons

15 total

Concurrency

Lessons

Fan Out URL Fetches

Guard the Shared Map

Report Every Upload

Fix the Deadlock

Bound the Concurrency

Merge the Streams

First Error Wins

Honor the Deadline

Fix the Goroutine Leak

Init Once

Read-Mostly Cache

Count Without Locking

Fix the Double Close

Drain Before Shutdown

Movie Night Watchlist