# Z12 Performance Of Serve Content Changes

**URL:** <https://zola.discourse.group/t/z12-performance-of-serve-content-changes/600>\
**Category:** Support\
**Created:** [September 22, 2020, 5:28pm UTC](https://zola.discourse.group/t/z12-performance-of-serve-content-changes/600 "2020-09-22T17:28:05Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![SgtIria](https://yyz2.discourse-cdn.com/free1/user_avatar/zola.discourse.group/sgtiria/32/85_2.png) [@SgtIria](https://zola.discourse.group/u/SgtIria)\
**Post date:** [September 22, 2020, 5:28pm UTC](https://zola.discourse.group/t/z12-performance-of-serve-content-changes/600/1 "2020-09-22T17:28:05Z")

</div>

Now we’ve been able to migrate our site to a working V12 (subject to 12.1 fixes) we’ve been using it as part of our content production and we’ve noticed that performance when editing content, with the new `hashtable` approach to HTML, is **really slow**.

## Zola 11 Serve

```auto
C:\Users\Iria\Zola\production (master -> origin)
λ zola serve -i 192.168.1.101 -p 2015 -u 192.168.1.101
Building site...
-> Creating 180 pages (0 orphan), 6 sections, and processing 0 images
Done in 27.6s.

Listening for changes in C:\Users\Iria\Zola\production\{content, config.toml, static, templates, themes}
Press Ctrl+C to stop

Web server is available at http://192.168.1.101:2015

Change detected @ 2020-09-22 17:41:58
-> Content changed C:\Users\Iria\Zola\production\content/language-courses\podcast-201-250\index.md
Done in 159ms.

Change detected @ 2020-09-22 18:04:42
-> Content changed C:\Users\Iria\Zola\production\content/language-courses\podcast-201-250\index.md
Done in 155ms.

```

After the initial build Z11 is slow but the **changes after that to markdown** are in `ms`.

## Z12 Serve

```auto
C:\Users\Iria\Zola\production (master -> origin)
λ zola serve -i 192.168.1.101 -p 2015 -u 192.168.1.101
Building site...
-> Creating 180 pages (0 orphan), 6 sections, and processing 0 images
Done in 20.5s.

Listening for changes in C:\Users\Iria\Zola\production{config.toml, content, static, templates}
Press Ctrl+C to stop

Web server is available at http://192.168.1.101:2015

Change detected @ 2020-09-22 18:13:55
-> Content changed C:\Users\Iria\Zola\production\content\discount\index.md
-> Creating 180 pages (0 orphan), 6 sections, and processing 0 images
Done in 20.4s.

Change detected @ 2020-09-22 18:15:27
-> Content changed C:\Users\Iria\Zola\production\content\discount\index.md
-> Creating 180 pages (0 orphan), 6 sections, and processing 0 images
Done in 20.8s.

Change detected @ 2020-09-22 18:16:46
-> Content changed C:\Users\Iria\Zola\production\content\testimonials\email\index.md
-> Creating 180 pages (0 orphan), 6 sections, and processing 0 images
Done in 20.9s.

```

> Notice now that every change made to markdown.md files results in a full **20 seconds**

---

<div class="post-metadata">

**Author:** ![keats](https://avatars.discourse-cdn.com/v4/letter/k/34f0e0/32.png) [@keats](https://zola.discourse.group/u/keats)\
**Post date:** [September 22, 2020, 5:32pm UTC](https://zola.discourse.group/t/z12-performance-of-serve-content-changes/600/2 "2020-09-22T17:32:56Z")

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That’s expected, the new approach rebuilds the whole site to avoid all the weird bugs the smart rebuild had. To get back roughly the same speed you had before, use `zola serve --fast` that will rebuild only the page that changed.

---

<div class="post-metadata">

**Author:** ![SgtIria](https://yyz2.discourse-cdn.com/free1/user_avatar/zola.discourse.group/sgtiria/32/85_2.png) [@SgtIria](https://zola.discourse.group/u/SgtIria)\
**Post date:** [September 22, 2020, 5:34pm UTC](https://zola.discourse.group/t/z12-performance-of-serve-content-changes/600/3 "2020-09-22T17:34:47Z")

</div>

Thanks for the CLI switch 🙂