> For the complete documentation index, see [llms.txt](https://docs.loci-dev.net/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.loci-dev.net/loci-inspector/top-bottleneck-in-functions.md).

# Top Bottleneck In Functions

This metric highlights the functions with the most significant performance bottlenecks, focusing on the most time-consuming segment of code within one function that doesn't include the execution time of the callee function (i.e., caller > callee).

<figure><img src="https://449949240-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FS2ZTr9umTUpVzGSJHbuR%2Fuploads%2FvjWCtKjSepg6VoXgtMh3%2Fimage.png?alt=media&amp;token=465867be-d844-4534-a8ad-7716192cfee4" alt=""><figcaption><p>Execution Metrics: Bottleneck Time</p></figcaption></figure>