About Bottleneck

One number, one line of code: here is what is making your app slow.

What we do

Continuous profiling that outputs a ranked verdict instead of a dashboard. It samples production continuously at negligible overhead, attributes latency and cost to specific functions, queries and dependencies, and publishes a weekly ordered list: this endpoint, this line, this query, costing this many milliseconds at this percentile and this many dollars of compute a month, with the specific change to make and the expected improvement. Regressions are caught per deploy and attributed to the pull request that caused them.

Who we built it for

• Engineering teams without a performance engineer

  Teams at 10 to 300 person companies running production web services.

• Tech leads told the app feels slow

  Leads who need an answer to what to fix, not another dashboard to argue over.

The problem

Observability tools produce beautiful dashboards and no answers.

A team stares at flame graphs and latency percentiles and still argues about what to fix, so performance work gets deprioritised until something breaks.

The information exists but the conclusion does not, and drawing the conclusion requires a skill most teams do not have on staff.

Try it before anything else

The free slow endpoint cost calculator runs in your browser with no account. Put in one endpoint's traffic, speed and share of compute, and see what making it faster is worth. Open it.