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Flying Scripts: Delay JavaScript to Improve Site Speed & Per...
Delay JavaScript to improve speed and performance by loading scripts only when needed, reducing render-blocking for a faster and smoother user experie …
The facts
- Rating
- 5★ from 38
- Active installs
- 30k+
- Price
- Free
- Last updated
- 20 May 2026
- Added
- Feb 2020
- Requires WP
- 4.5
- Tested up to
- WP 7.0.4
- Requires PHP
- 5.6
- Downloads
- 290,155
Our analysis
AI-assistedFlying Scripts is a WordPress plugin designed to improve site speed and performance by delaying the execution of JavaScript until there is no user interaction. It allows you to specify which JavaScripts to delay, helping to prioritise critical scripts that are necessary for initial rendering.
This plugin is suitable for website owners who want to enhance their site's performance by reducing the load on browsers and improving metrics like render time and time to interactive. It is particularly useful for those with non-critical JavaScript that can be executed later without impacting the user experience.
Best for: Website owners looking to optimise site speed and performance.
What it does well
- ✓Delays JavaScript execution until user activity ceases
- ✓Allows specification of which scripts to delay
- ✓Reduces resource load on browsers
- ✓Improves site metrics like render time and time to interactive
- ✓Free to use from the WordPress.org directory
Where it falls short
- •Limited information on additional features or support options
Verdict
Flying Scripts offers a straightforward solution for delaying non-critical JavaScript, which can help improve site performance. It is a practical choice for those focused on enhancing user experience through speed optimisation.
From the developer
Gijo Varghese's own description of Flying Scripts: Delay JavaScript to Improve Site Speed & Per..., lightly tidied.
Download and execute JavaScript on user interaction.
Flying Scripts delay the execution of JavaScript until there is no user activity. You can specify keywords to include JavaScripts to be delayed. There is also a timeout which executes JavaScript when there is no user activity.
Why should I use this plugin?
JavaScript is very resource-heavy. By delaying the execution of non-critical JavaScript (that are not needed for the initial render), you’re prioritizing and giving more resources to critical JavaScript files. This way you will reduce render time, time to interactive, first CPU idle, max Potential input delay etc. This will also reduce initial payload to browsers by reducing the no. of requests.
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