Kajabi / RAILS PERFORMANCE OPTIMIZATION

Kajabi Experts: faster SQL processing, usable pages

Optimized the Rails data path for unusable pages. The Ruby-versus-SQL processing benchmark showed 79.74× higher throughput; separately, the article reports page loading falling from over 30 seconds to 300ms.

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Kajabi: Kajabi Experts: Rails Performance Optimization

ClientKajabi

Work deliveredRails Application Performance Optimization

Business result79.74× · SQL vs Ruby processing throughput

THE EXISTING PRODUCT

Performance optimization for the Kajabi Experts product

Kajabi Experts had launched as an MVP, but some pages had become so slow that end users could not open them. WideFix took ownership of the performance issue and worked with Kajabi to make the product responsive again.

An MVP page had become unusable for some end users. Targeted Rails and SQL optimization restored a responsive experience without replacing the product or its framework.

THE BUSINESS CHALLENGE

Find and fix the slow path in Rails

We investigated how the page assembled its data, identified the most expensive application and database work, and planned targeted changes. The focus was on making the data processing more efficient in SQL while preserving the page's existing behavior.

What needed to change

The MVP had shipped without enough attention to performance. As a result, some important pages took so long to respond that they were effectively unavailable to users. That created a poor first impression and made the product harder to adopt.

Rails Application Performance Optimization for Kajabi

THE WORK WE DELIVERED

Improve the product. Keep the business moving

01
Analyze the slow page and prioritize bottlenecks
We took ownership of the issue, analyzed the slow page and its Rails data path, then prioritized the changes most likely to improve response time. The work focused on efficient database querying rather than replacing the framework or rebuilding the product.
02
Optimize the data path and verify the result
We moved expensive Ruby-side processing into SQL and checked that the page returned the expected data. The published benchmark compares processing throughput: SQL achieved 451.144 iterations per second versus 5.658 for Ruby, a 79.74× improvement. Separately, the article reports page loading falling from over 30 seconds to 300ms; that observation is not the processing benchmark.

Kajabi: delivered rails application performance optimization

VALUE FOR THE BUSINESS

Kajabi Experts: Rails Performance Optimization: the results

SQL vs Ruby processing throughput79.74×

Reported page load before>30 seconds

Reported page load after300ms

The published 79.74× result measures Ruby-versus-SQL processing throughput, not end-to-end page performance. The article separately reports a page-load change from over 30 seconds to 300ms, without documenting the browser, device, network or timing method. No LCP, INP or CLS measurements are published, so these results do not establish a Core Web Vitals improvement.

THE ENGINEERING DETAILS

More about the work

Optimize Rails app performance with ChatGPT

An engineering walkthrough of turning slow Ruby-side processing into SQL and validating the result.

Read the article ↗

Make your Ruby on Rails app 80x faster with SQL

A 79.74× Ruby-versus-SQL processing benchmark, plus a separately reported page-load change from over 30 seconds to 300ms.

Read the article ↗

WE TAKE OWNERSHIP OF EXISTING RUBY ON RAILS APPLICATIONS

Need to improve performance in an existing Rails app?

Need someone to take over your Rails app? We maintain, stabilize and improve existing Rails applications, from production issues and upgrades to new features and infrastructure. Keep your product moving without unnecessary rewrites or rebuilding your engineering team.

Discuss your Rails app Rails performance audit and optimization →PostgreSQL performance consulting →Explore existing Rails app takeover

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