29 Jul '15, 7pm

rack-mini-profiler - the Secret Weapon of Ruby and Rails Speed

How many SQL queries am I generating ? This view generates a total of 9 SQL queries. That strikes me as lot, especially since this is just the homepage for a non-logged-in user. Usually, for simple pages, you wouldn't want to see more than 1 to 3 queries, and almost always you'd like just a 1 query per ActiveRecord model class. What's my total request time? This view is a little slow - 85ms. For a mostly-static and highly visited page like this (like I said, it's the homepage) I'd like to see it be completed in under 50ms. What % of time am I spending in SQL? This view is doing fairly well as far as time spent in SQL goes. I always test my applications with a copy of the production database - this makes sure that my query results match production results as much as possible. Too often, simplistic development databases return 1000 results where a production database would r...

Full article: http://www.nateberkopec.com/2015/08/05/rack-mini-profiler...

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