loganlinn / har-wrk

Tiny utility for benchmarking with HTTP requests from a HAR file

har-wrk

benchmarking shouldnt be har-wrk

This is a dead-simple utility for using the wrk HTTP benchmarking tool and HAR files to make the same requests to your server that your browser does.

It generates a Lua script for wrk that continuously makes a series of requests you choose from a HAR file.

1. Setup

Install requirements: Node.js and wrk.

# on a mac
brew install node
brew install wrk

Clone this repo and install dependencies:

git clone [email protected]:loganlinn/har-wrk.git
cd har-wrk
npm install

2. Get a HAR file

Using your browser of choice (or some other HAR tool), capture a set of requests that you want to benchmark into a HAR file.

3. Update entryFilter.js as necessary

Update the function that determines whether request of a HAR entry should be included in the output.

At a minimum, you'll want to filter to the requests made to the server you'll be benchmarking by looking at entry.request.url.

4. Generate Lua script

The harToWrkScript.js takes HAR file on STDIN and writes a Lua script to STDOUT.

harToWrkScript.js < input.har > script.lua

Take a peek at the generated script to make sure it has the requests you want to benchmark.

5. Run benchmark

Run wrk with the script and specify a base URL. See wrk --help for available options.

wrk -s script.lua http://localhost:8080