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wtf is vmprof-server?

njsmith/vmprof-server — explained in plain English

Analysis updated 2026-07-18 · repo last pushed 2018-07-20

JavaScriptAudience · developerComplexity · 3/5DormantSetup · moderate

TL;DR

A dashboard service that visualizes Python performance profiles, showing exactly which functions and lines are slowing your program down.

Mindmap

mindmap
  root((vmprof-server))
    What it does
      Displays profiling data
      Interactive dashboards
      Flight recorder for code
    Tech stack
      Django
      Python
      Docker
    Use cases
      Speed up ML training
      Find slow database queries
      Pre-scaling performance checks
    Audience
      Data scientists
      Web developers
      Backend engineers
    Deployment
      Hosted at vmprof.com
      Self-host with Docker

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filefunction / class

Why would anyone build with this?

REASON 1

Find out why a machine learning training run is taking hours by profiling where CPU time goes.

REASON 2

Discover that a single database query is slowing down every request in a web app.

REASON 3

Check a backend service's efficiency before scaling it up to more traffic.

REASON 4

Self-host a private VMProf server with Docker instead of using the public vmprof.com instance.

What's in the stack?

PythonDjangoDockerJavaScript

How it stacks up

njsmith/vmprof-server3rd-eden/ircb.ioa15n/a15n
LanguageJavaScriptJavaScriptJavaScript
Last pushed2018-07-202016-11-162019-04-07
MaintenanceDormantDormantDormant
Setup difficultymoderateeasyeasy
Complexity3/52/52/5
Audiencedeveloperdevelopergeneral

Figures from each repo's GitHub metadata at analysis time.

How do you spin it up?

Difficulty · moderate Time to first run · 30min

Requires installing a profiling client in your Python project plus either the hosted vmprof.com service or your own Docker deployment.

Open source and welcomes contributions, though the exact license terms aren't stated.

Wtf does this do

VMProf is a web service that analyzes how fast Python programs run and where they spend their time. When you run Python code on PyPy or CPython (the standard Python versions), VMProf captures detailed information about what your program is doing, which functions are being called, how much CPU time each one uses, and where bottlenecks happen. You then upload that data to the VMProf server, which displays it in an easy-to-read dashboard so you can understand and optimize your code's performance. The way it works is straightforward: there's a small tool you install in your Python project that watches your code while it runs and records performance data. That data gets sent to this server, which stores it and presents it as interactive visualizations. Think of it like a flight data recorder for your Python application, it captures what happened, and then you can play it back to see exactly where time was wasted. People use VMProf when they need to make their Python applications faster. A data scientist running a machine learning model might use it to find out why training is taking hours. A web developer could use it to discover that one database query is slowing down every request. A startup building a backend service could use it to make sure their code is efficient before scaling it up. Essentially, anyone writing Python who cares about speed can benefit from it. The service itself is built as a Django application, a Python web framework, and the README mentions it's available at vmprof.com as a hosted service. If you want to run your own private version, the repository includes a Docker setup so you can run it in a container without worrying about dependencies. The project is open-source and welcomes contributions, the developers use automated testing and continuous integration to make sure new changes don't break existing functionality.

Yoink these prompts

Prompt 1
Show me how to record a Python performance profile with VMProf and upload it to see where my program spends its time.
Prompt 2
Explain how to set up my own private VMProf server using the included Docker setup.
Prompt 3
Help me interpret a VMProf dashboard to find the slowest function in my Python web app.
Prompt 4
Walk me through profiling a PyPy vs CPython run of the same script using VMProf.

Frequently asked questions

wtf is vmprof-server?

A dashboard service that visualizes Python performance profiles, showing exactly which functions and lines are slowing your program down.

What language is vmprof-server written in?

Mainly JavaScript. The stack also includes Python, Django, Docker.

Is vmprof-server actively maintained?

Dormant — no commits in 2+ years (last push 2018-07-20).

What license does vmprof-server use?

Open source and welcomes contributions, though the exact license terms aren't stated.

How hard is vmprof-server to set up?

Setup difficulty is rated moderate, with roughly 30min to a first successful run.

Who is vmprof-server for?

Mainly developer.

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