We Redesigned Our MVP in Go — and Cut Latency by 90%

Startups exist in a world of high stakes where speed, stability, and user experience can be success or failure.

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When we released our MVP, we wrote it in Python for flexibility and ease of use in rapid prototyping. But as our user base expanded, latency became astronomical and our servers creaked under the weight.

Redesigning our MVP in Go (Golang) was a gamble, but it reduced our latency by 90% and revolutionized our product. Here’s our story, why Go was the perfect tool for the job, and what we learned along the way.

The Latency Problem

Our initial MVP, a live analytics service, was built using Python and Flask. Fast development was great, but once we hit 10,000 concurrent users, response time jumped to 2–3 seconds.

Customers were furious, and we were losing a small fortune on extra servers to maintain. Python’s Global Interpreter Lock (GIL) was choking on concurrency, and our cloud bills were exploding.

Ever hit the peak of a performance wall with your stack? How did you recover?

Why We Chose Go

We required a language that was fast, scalable, and not PhD-level to code. Go was unique in its simplicity…