Server Benchmarks
August 12, 2026 · View on GitHub
A benchmark suite that stress-tests real web framework applications and writes the results as Markdown tables, SVG charts, CSV files and a machine-readable results.json.
The measuring is done by bombardier, a third-party HTTP load generator, not by this suite. Every framework runs as a self-contained program under _code/, written the way its own documentation recommends. Anyone can read the app code, run the same command and compare numbers.
Frameworks
| Framework | Language | Version source |
|---|---|---|
| Iris | Go | _code/*/iris/go.mod |
| Gin | Go | _code/*/gin/go.mod |
| Echo | Go | _code/*/echo/go.mod |
| Chi | Go | _code/*/chi/go.mod |
| Fiber | Go | _code/*/fiber/go.mod |
| net/http (standard library baseline) | Go | _code/*/nethttp/go.mod |
| Express | Javascript | _code/*/express/package.json |
| Koa | Javascript | _code/*/koa/package.json |
| Fastify | Javascript | _code/*/fastify/package.json |
| ASP.NET Core minimal APIs | C# | _code/*/aspnetcore/*.csproj |
Versions are pinned in each app's manifest and kept current by Dependabot. Node apps run one worker per CPU through the builtin node:cluster module, since a single Node process is single-threaded; Go and .NET runtimes schedule across cores on their own.
Tests
| Test | Request | What it exercises |
|---|---|---|
| Static | GET / | routing, plain text response |
| Parameterized | GET /hello/{name} | dynamic path parameters |
| REST | POST /{id} with a ~1MB JSON array | routing constraints, JSON decode and encode (2MB body limit) |
Each test fires 100000 requests over 125 concurrent connections. All of it is configuration, not code: see the schema comment at the top of tests.yml.
Install
The tool itself only needs the Go Programming Language:
go install github.com/kataras/server-benchmarks@latest
go install github.com/codesenberg/bombardier@latest
Node.js 24+ and the .NET SDK 10 are needed only for the Javascript and C# environments. Without them, select the Go environments with -t, or let those environments fail and read the partial report.
Usage
server-benchmarks # run everything in ./tests.yml, write reports to ./
server-benchmarks list # print the tests and environments without running
server-benchmarks version # print version information
server-benchmarks help # global help
The run subcommand (implied when omitted) accepts:
| Flag | Default | Meaning |
|---|---|---|
-i | ./tests.yml | spec file to read |
-o | ./ | output directory for the reports |
-t | (all) | run only a test or a single test.env; repeatable |
-wait-run | 3s | idle time between two benchmarks |
-readme | off | also generate a publishable README.md |
-bombardier | from PATH | path of the bombardier executable |
-v | off | debug logging, including the servers' own output |
# only the REST test, plus one specific pairing:
server-benchmarks run -t rest -t static.iris
# a development spec into a separate directory:
server-benchmarks run -i ./tests.dev.yml -o ./dev -wait-run 5s
A finished run leaves behind RESULTS.md, one <test>.csv and <test>_latency.csv per test, one <test>.svg and <test>_latency.svg chart per test, and results.json. The charts are embedded in RESULTS.md and adapt to light and dark GitHub themes.
export re-renders every artifact from a saved results.json, so you can regenerate reports after a template change without benchmarking again:
server-benchmarks export -i ./results.json -o ./
Test a private or unreleased framework
An environment does not need a public repository. Point it at any local directory that contains a runnable server implementing the test's contract:
Envs:
- Name: Iris (next)
Dir: C:/github/iris-private/_benchmarks/static
For an unreleased version of a framework that already has apps here, copy the app instead (e.g. _code/static/iris to _code/static/iris-next) and add a replace directive to its go.mod:
replace github.com/kataras/iris/v12 => C:/github/iris-private
Then run just that pairing: server-benchmarks run -t "static.iris (next)".
Run with Docker
The image bundles Go, Node.js, the .NET SDK and bombardier, so the full suite runs without installing anything else:
docker build -t server-benchmarks .
docker run --rm -v ${PWD}:/data server-benchmarks
Reports land in the mounted directory. ${PWD} works in both PowerShell and Unix shells.
Results
Results are machine-generated per run and depend heavily on the hardware. A fresh official run with the current roster has not been published yet; run the suite yourself, or expand the section below for the last published numbers.
Historical results (previous roster, Jun 20, 2022)
These numbers predate the current roster (they include Martini and Buffalo, since removed, and the Kestrel app replaced by ASP.NET Core minimal APIs) and ran on Go 1.19beta1, .NET 6 and Node 18 with different request counts.
System
| Processor | AMD Ryzen 9 4900HS with Radeon Graphics |
| RAM | 15.42 GB |
| OS | Microsoft Windows 11 Pro |
| Bombardier | v1.2.4 |
| Go | go1.19beta1 |
| .NET | 6.0.300 |
| Node.js | v18.2.0 |
Test: Static
📖 Fires 1000000 requests, receives a static message as response.
| Name | Language | Reqs/sec | Latency | Throughput | Time To Complete |
|---|---|---|---|---|---|
| Iris | Go | 284059 | 438.34us | 49.58MB | 3.52s |
| Chi | Go | 275525 | 451.01us | 48.18MB | 3.62s |
| Echo | Go | 267815 | 466.16us | 46.64MB | 3.74s |
| Kestrel | C# | 263479 | 472.72us | 44.68MB | 3.80s |
| Gin | Go | 263399 | 472.70us | 45.98MB | 3.80s |
| Martini | Go | 233051 | 534.43us | 40.68MB | 4.29s |
| Koa | Javascript | 131274 | 0.93ms | 29.24MB | 7.50s |
| Buffalo | Go | 78963 | 1.58ms | 13.78MB | 12.66s |
| Express | Javascript | 41078 | 3.02ms | 11.54MB | 24.22s |
Test: Parameterized
📖 Fires 550000 requests with a dynamic parameter of string, receives a hello text based on the parameter as response.
| Name | Language | Reqs/sec | Latency | Throughput | Time To Complete |
|---|---|---|---|---|---|
| Iris | Go | 277099 | 449.55us | 53.07MB | 1.99s |
| Chi | Go | 272434 | 456.62us | 52.21MB | 2.02s |
| Echo | Go | 261467 | 476.01us | 50.14MB | 2.10s |
| Gin | Go | 259308 | 480.32us | 49.70MB | 2.12s |
| Kestrel | C# | 233843 | 534.73us | 43.34MB | 2.36s |
| Martini | Go | 225790 | 551.37us | 43.29MB | 2.44s |
| Koa | Javascript | 114667 | 1.08ms | 27.21MB | 4.78s |
| Buffalo | Go | 76747 | 1.63ms | 14.71MB | 7.17s |
| Express | Javascript | 37110 | 3.32ms | 11.11MB | 14.69s |
Test: REST
📖 Fires 200000 requests with a dynamic parameter of int, sends JSON as request body and receives JSON as response.
| Name | Language | Reqs/sec | Latency | Throughput | Time To Complete |
|---|---|---|---|---|---|
| Iris | Go | 238954 | 521.69us | 64.15MB | 0.84s |
| Gin | Go | 229665 | 541.96us | 62.86MB | 0.87s |
| Chi | Go | 228072 | 545.78us | 62.61MB | 0.88s |
| Echo | Go | 224491 | 553.84us | 61.70MB | 0.89s |
| Martini | Go | 198166 | 627.46us | 54.47MB | 1.01s |
| Kestrel | C# | 163486 | 766.90us | 47.42MB | 1.23s |
| Buffalo | Go | 102478 | 1.22ms | 28.14MB | 1.95s |
| Koa | Javascript | 48425 | 2.56ms | 15.39MB | 4.14s |
| Express | Javascript | 23622 | 5.25ms | 9.04MB | 8.41s |
Terminology
Name is the name of the framework (or router) used under a particular test.
Reqs/sec is the average number of requests processed per second (the higher the better).
Latency is the time from when a request is made by the client until the response gets back to that client (the lower the better).
Throughput is the rate at which data is transferred (the higher the better; it depends on the response length, body plus headers).
Time To Complete is the total time the test took to complete (the lower the better).
Contributing
Want a framework added? Read CONTRIBUTING.md; it takes one app directory per test and one entry in tests.yml.
License
This project is licensed under the MIT License.