Skylight

Skylight is a smart profiler for Ruby and Rails applications, designed to turn performance data into actionable insights. It is claimed to be suitable for companies of all sizes, from startups to large enterprises. According to the vendor, Skylight is used by software developers and engineers, DevOps engineers, IT managers, e-commerce companies, and SaaS companies.

Key Features

Rails Performance Reporting: According to the vendor, Skylight visualizes app performance data in a way that aims to make it easy to understand and act on. The vendor claims that Skylight's intuitive interface allows users to improve their app without requiring advanced performance expertise.

Sources of Agony: Skylight sorts endpoints by "agony," a combination of popularity and response time, to highlight areas for potential performance gains. The vendor states that Skylight also alerts users to allocation hogs and repeated queries that may impact app performance. Users have the ability to sort, filter, and search endpoints based on various attributes. Skylight also separates html, json, and errors to provide a clear view of each response type.

Endpoint Intelligence: According to the vendor, users can analyze a histogram of response times to identify infrequent slowdowns that may skew the average. Skylight allows users to view aggregate event sequences by time or allocations, assisting in identifying bottlenecks. Users can focus on the differences between their fastest and slowest responses, and Skylight supports aggregated GraphQL queries by name. The vendor claims that users can troubleshoot issues by clicking on an event in the timeline to view aggregated, sanitized SQL queries. Additionally, Skylight enables users to identify the specific lines of code responsible for timeline events.

Communicate Improvements: Skylight's trends feature generates a weekly report that aims to help users identify performance slowdowns before they impact customers. Users can track the results of their performance improvement efforts and share them with stakeholders. Skylight also provides insights on endpoints that have experienced the most significant performance degradation since the previous week, allowing users to anticipate potential issues. The vendor claims that users can also identify endpoints that have gradually declined in performance over a six-week period.