# First Byte Time vs CDN?

**URL:** <https://meta.discourse.org/t/first-byte-time-vs-cdn/141899>\
**Category:** Development\
**Created:** [February 18, 2020, 2:14pm UTC](https://meta.discourse.org/t/first-byte-time-vs-cdn/141899 "2020-02-18T14:14:33Z")\
**Posts on this page:** 1\
**Showing post:** 11

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**Author:** ![marianord](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/marianord/32/90502_2.png) [@marianord](https://meta.discourse.org/u/marianord)\
**Post date:** [February 18, 2020, 9:06pm UTC](https://meta.discourse.org/t/first-byte-time-vs-cdn/141899/11 "2020-02-18T21:06:18Z")

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No, there’s none. The CDN will cache those assets from S3 when needed.

> [@eextra](#):
>
> And what is the reason to use a subdomain for cdn addres?

That is just a vanity address, is not needed at all.

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