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Pow vs Unicorn: What are the differences?
What is Pow? Zero-configuration Rack server for Mac OS X. Pow is a zero-configuration Rack server for Mac OS X. It makes developing Rails and Rack applications as frictionless as possible. You can install it in ten seconds and have your first app up and running in under a minute. No mucking around with /etc/hosts, no compiling Apache modules, no editing configuration files or installing preference panes. And running multiple apps with multiple versions of Ruby is trivial.
What is Unicorn? Rack HTTP server for fast clients and Unix. Unicorn is an HTTP server for Rack applications designed to only serve fast clients on low-latency, high-bandwidth connections and take advantage of features in Unix/Unix-like kernels. Slow clients should only be served by placing a reverse proxy capable of fully buffering both the the request and response in between Unicorn and slow clients.
Pow and Unicorn can be primarily classified as "Web Servers" tools.
Pow and Unicorn are both open source tools. Pow with 3.47K GitHub stars and 259 forks on GitHub appears to be more popular than Unicorn with 1.35K GitHub stars and 249 GitHub forks.
I have an integration service that pulls data from third party systems saves it and returns it to the user of the service. We can pull large data sets with the service and response JSON can go up to 5MB with gzip compression. I currently use Rails 6 and Ruby 2.7.2 and Puma web server. Slow clients tend to prevent other users from accessing the system. Am considering a switch to Unicorn.
Consider trying to use puma workers first. puma -w basically. That will launch multiple puma processes to manage the requests, like unicorn, but also run threads within those processes. You can turn the number of workers and number of threads to find the right memory footprint / request per second balance.
Pros of Pow
Pros of Unicorn
- Fast81
- Performance59
- Web server36
- Very light30
- Open Source30
- Rack http server27
- Load balancing18
- Great process management14
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Cons of Pow
Cons of Unicorn
- Not multithreaded4
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What is Pow?
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