Skylight, a Ruby profiler, free for open source applications

The Rust language community has recently released a case study on Skylight and how Rust has been a competitive advantage for them.[0]<p>[0] <a href="https:&#x2F;&#x2F;www.rust-lang.org&#x2F;pdfs&#x2F;Rust-Tilde-Whitepaper.pdf" rel="nofollow">https:&#x2F;&#x2F;www.rust-lang.org&#x2F;pdfs&#x2F;Rust-Tilde-Whitepaper.pdf</a>

If you&#x27;re building a Rails app, you should be using Skylight. It gives you:<p>1. What&#x27;s slow.<p>2. What&#x27;s hit frequently.<p>This combined gives their &quot;agony&quot; ranking for you to fix problems that impact the most. In a very clean UI!<p>Terrific product. I wish I had Skylight for my Phoenix&#x2F;Elixir stack.

Has anyone used New Relic and switched to Skylight or vice versa? Been looking for some comparisons [1].<p>[1]: <a href="https:&#x2F;&#x2F;twitter.com&#x2F;sunnyrjuneja&#x2F;status&#x2F;951973556170215424" rel="nofollow">https:&#x2F;&#x2F;twitter.com&#x2F;sunnyrjuneja&#x2F;status&#x2F;951973556170215424</a>

Note to the Skylight marketing team: I had never heard of your service in 10 years of using Rails, even if it was something that could very valuable to me. But if I open the homepage what I see is:<p>&quot;DO THE ANSWER DANCE&quot;. Cool looking weirdo characters dancing. Generic charts-filled dashboard screenshots. Comparatively very small text saying &quot;learn why your app is slow&quot;.<p>If you hadn&#x27;t been vouched by this HN thread, I would have never read below the fold to learn that you allow profiling Rails apps.

I see that the logs and analysis will be open to everyone. I guess that&#x27;s equivalent to using Travis, CircleCI, etc. on their free&#x2F;open tiers. But API logs and analysis like Skylight performs can have much more unpredictable and sensitive info in them than test&#x2F;build logs.<p>Does this mean that all private fields needs be scrubbed in-app, before Skylight? For example, a hosted OSS service that includes e-mail addresses or location data in API query strings.

Been using this on production for ~1 year now, no complaints so far!

“Skylight is a smart profiler for Ruby on Rails applications.”