> ## Documentation Index
> Fetch the complete documentation index at: https://codspeed.io/docs/llms.txt
> Use this file to discover all available pages before exploring further.

> Integrated CI tools for software engineering teams to anticipate the impacts of the next delivery on performances.

# What is CodSpeed?

CodSpeed is a continuous performance testing platform to track, compare and
optimize the performance of your codebase during development, before having
performance issues in production.

Running benchmarks using a traditional statistical approaches is usually
unreliable on CI environments.

To measure the performance of your code in an accurate and reproducible way,
CodSpeed uses various instruments when running your code. Those instruments
isolate noisy neighbors and all the side effect they can have on when measuring
the performance of our workloads. CodSpeed then brings concise performance
reports during your development process. To help you improve your codebase
performance and find bottlenecks, CodSpeed gives you extended insights,
including detailed execution profiles for all your performance tests.

For the most convenience, all these perks are directly available within your
repository provider (Pull Requests comments and Merge checks).

## What can be measured?

CodSpeed can measure the performance of different types of code, thanks to its
instruments:

* The core of CodSpeed is the [CPU instrument](/instruments/cpu). Use it measure
  the performance of algorithms, data processing steps, mathematical operations,
  and basically any kind CPU-bound tasks. Extensive data is collected during the
  execution of the code, which is used to create consistent
  [performance measurement](/features/understanding-the-metrics/) and
  [detailed flame-graphs](/features/profiling) of the code.
* The [Walltime instrument](/instruments/walltime/) measures the real time taken
  by your code to execute. It is useful to measure end-to-end performance of
  your code, including system calls, I/O operations, network requests, and
  database queries. It leverages CodSpeed's
  [Macro Runners](/features/macro-runners/) to provide a stable and isolated
  environment for running your benchmarks with low noise and high precision.
* The [Databases instrument](/instruments/databases/) measure the performance of
  database queries. They allow you to track and compare the performance of your
  database queries during development.

## How does it work?

<img src="https://mintcdn.com/codspeed/jKaxX6yy-Kzw1C-0/assets/overview.dark.png?fit=max&auto=format&n=jKaxX6yy-Kzw1C-0&q=85&s=d26ff61326e10b5c0de1a26f9a90426c" alt="Overview of CodSpeed's architecture" className="w-full max-w-lg mx-auto" width="1904" height="756" data-path="assets/overview.dark.png" />

The core of the performance measurement is done directly within your CI
environment through the CodSpeed Action, allowing you to stay the sole owner of
your data and to keep your codebase private.

Once the performance data is generated, only the benchmark results are sent to
the CodSpeed servers to be analyzed.

Then, performance reports are generated and published directly within your
Pull/Merge Request comments.

## How long does it take to install?

The fastest way to get started is the [CodSpeed Wizard](/ai/wizard), which
automates the entire setup: it analyzes your repository, configures benchmarks,
generates a CI workflow, and opens a pull request — all in minutes.

If you prefer to set things up manually, you can plug your existing benchmark
suites into CodSpeed in less than 5 minutes since CodSpeed's benchmark API is
compatible with the most popular benchmarking frameworks for each language.

If you don't have any benchmarks yet, you can get started by
[creating benchmarks](/benchmarks/overview). You can create your first
benchmarks in just a few minutes by reusing existing unit tests.