Skylight | Features

Rails performance reporting

Skylight visualizes all your app’s performance data in a way that makes it easy to understand and act on.

Intuitive Interface
Our visualizations don't require you to be a performance expert to markedly improve your app.
True response times
See typical speeds as well as problem responses for an in-depth look at your app’s performance.
Featherweight Agent
Skylight is written in Rust, which uses fewer resources than the Ruby agents of our competitors.
Deploy Tracking
We plot deploys on a graph so you can see how changes in your code are affecting performance.
Background Jobs
Discover and correct hidden performance issues in your Sidekiq, DelayedJob, and ActiveJob queues.
More than rails
We support many Ruby frameworks including Rails, Sinatra, and Grape.

Sources of agony

Skylight sorts your endpoints by “agony” — a combination of popularity and response time — to show you which endpoints to improve for the biggest performance gains.

Mistake detection
Skylight notifies you of allocation hogs and repeated queries that may slow down your app.
Endpoint exploration
In addition to agony, you can sort, filter, and search by other attributes to find exactly what you’re looking for.
Response types
Don't mix apples and oranges. Skylight separates html, json, and errors so you get a clear picture of each.

Endpoint intelligence

Interact with Skylight’s endpoint data to understand the events that lead to slowdowns and how to prevent them in the future.

Response time distribution
View a histogram of response times and discover low-frequency slowdowns that skew your average.
Event sequence
See aggregate event sequences by time or allocations to find out where bottlenecks are occurring.
Timeline filter
Pinpoint your slowest responses. Hone in on the differences between your fastest and slowest responses.
GraphQL Support
See GraphQL queries aggregated by name in the dashboard and endpoint event sequences.
Aggregated SQL Analysis
Click an event in the timeline to see aggregated, sanitized SQL queries to troubleshoot issues.
Source Locations
Discover which code is responsible for a timeline event, right down to the line number.

Communicate improvements

Our trends feature distills your performance data into a weekly report that helps you catch slowdowns before your customers do.

Most improved endpoints
See the results of your performance improvement efforts and share them with stakeholders.
Slowdown warnings
See which endpoints have slowed the most since last week to anticipate potential performance issues.
Frog boils
Discover which endpoints have slowly declined in performance over a six week period.