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Comment on Show HN: I made a site that calculates the market price of items on ebayparent

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What did you learn about load testing and optimisation? Any tips, cribnotes?

The most useful tip I could give you (if you're building on rails and deploying to heroku) is to use a Unicorn Webserver. It allows your to handle far more concurrent requests.

This article explains it better than I ever will.

http://blog.codeship.io/2012/05/06/Unicorn-on-Heroku.html

I'm running 8 unicorn workers per dyno at the moment and that's still within the 512mb memory limit because I'm not using ActiveRecord.

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