add an faq entry saying that powerlevel10k is not fast to load

pull/106/head
romkatv 5 years ago
parent fa5aedcf9e
commit dcb76b224e

@ -33,6 +33,7 @@ It's simply [much faster](#is-it-really-fast).
1. [FAQ](#faq)
1. [Why does Powerlevel10k spawn extra processes?](#why-does-powerlevel10k-spawn-extra-processes)
1. [Are there configuration options that make Powerlevel10k slow?](#are-there-configuration-options-that-make-powerlevel10k-slow)
1. [Is Powerlevel10k fast to load?](#is-powerlevel10k-fast-to-load)
1. [Does Powerlevel10k always render exactly the same prompt as Powerlevel9k given the same config?](#does-powerlevel10k-always-render-exactly-the-same-prompt-as-powerlevel9k-given-the-same-config)
1. [I am getting an error: "zsh: bad math expression: operand expected at end of string"](#i-am-getting-an-error-zsh-bad-math-expression-operand-expected-at-end-of-string)
1. [Is there an AUR package for Powerlevel10k?](#is-there-an-aur-package-for-powerlevel10k)
@ -222,6 +223,25 @@ No, Powerlevel10k is always fast, with any configuration you throw at it. If you
prompt latency when using Powerlevel10k, please
[open an issue](https://github.com/romkatv/powerlevel10k/issues).
### Is Powerlevel10k fast to load?
The short answer is no. The amount of time it takes for Powerlevel10k to render the first prompt
is in the same ballpark as for Powerlevel9k.
Time to first prompt can be measured with the following benchmark:
```zsh
time (repeat 100 zsh -dfis <<< 'source ~/powerlevel10k/powerlevel10k.zsh-theme')
```
On the same machine as in the [prompt benchmark](#is-it-really-fast) this results in 147 ms per
invocation when executed in a small git repository (I used the `powerlevel10k` repo itself). For
comparison, the same benchmark gives 170 ms for powerlevel9k/master and 505 ms for
powerlevel9k/next.
If your workflow requires that you open a terminal tab, type a command or two and close the tab,
Powerlevel10k isn't the best choice. Powerlevel10k is optimized for long-lived ZSH sessions.
### Does Powerlevel10k always render exactly the same prompt as Powerlevel9k given the same config?
This is the goal. You should be able to switch between Powerlevel9k and Powerlevel10k with no

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