Add Performance Issue Template

.github/ISSUE_TEMPLATE/ISSUE_TEMPLATE.md

@@ -1,3 +1,12 @@
+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: ''
+assignees: ''
+
+---
+
 Thanks for opening an issue! For a project that deals with as many different things as P9k, debugging problems can be difficult. Please follow the guide, below, to create a bug report that will help us help you!
 
 ### Before Opening a Bug

.github/ISSUE_TEMPLATE/PERFORMANCE_ISSUE_TEMPLATE.md

@@ -0,0 +1,38 @@
+---
+name: Performance Issue
+about: For performance Issues
+title: "[Performance]"
+labels: performance
+assignees: ''
+
+---
+
+Sorry to hear that the performance of P9K is not adequate. To fix this, please provide us with some hints.
+
+### Your Hardware
+
+Disk I/O is critical for P9K, so do you use a spinning disk, or a SSD?
+
+### Virtualization
+
+Do you use P9K in some sort of virtualization? This is also the case, if you use WSL on Windows..
+
+### How Fast is Fast
+
+Could you quantify how fast the specific segment is, that you think is slow?
+For example, if you think the `vcs` segment is slow, could you execute this command in the directory, where the segment is slow:
+
+```zsh
+time (repeat 10; do; prompt_vcs left 1 false >/dev/null; done;)
+```
+
+Also, please provide us with some context around the segment. In the `vcs` example:
+
+- How big is the repo?
+- Does it contain a lot of untracked files?
+- Does it contain a lot of git submodules?
+- Does it contain a lot of files in general?
+
+Additionally, you could install [zsh-prompt-benchmark](https://github.com/romkatv/zsh-prompt-benchmark), to benchmark the general performance of ZSH and P9K.
+
+If you don't know which segment is slow, could you remove one by one, and spot the one that made the greatest impact?