Time-to-Live (TTL)
Time-to-Live is a setting for a piece of content in a cache that specifies how long it should be considered "fresh." After the TTL expires, the caching system knows it must re-validate the content with the Origin Server on the next request to see if it has changed. A well-configured TTL is essential for balancing performance (serving content from cache) with content freshness.
Related web performance terms
- Tag Manager
A tag manager (like Google Tag Manager) is a system that allows marketing and business teams to add and manage third-party marketing tags (snippets of code for analytics, advertising, etc.) on a we…
- Third-Party Script/Tool
A third-party script or tool is any piece of code, functionality, or service that is provided by an external vendor and integrated into a website.
- Throttling (CPU & Network)
Throttling is a technique used in Lab Data tools (like Lighthouse) to simulate how a website would perform on slower devices or less reliable network connections.
- Time To First Byte (TTFB)
A foundational web performance metric measuring the time from when a user makes a request to when their browser receives the very first byte of the HTML response.