Updated and improved the README

README.md

@@ -2,11 +2,16 @@
 
 A fork of [Sherly](https://github.com/BlyDoesCoding/Sherly), using [xxHash](https://github.com/Cyan4973/xxHash).
 
+![](./images/screenshot.png)
+
 ## Introduction
 
 Sherly is a Multithreaded Duplicate File Finder for your Terminal, written in java. You can Easily find duplicate Images, videos as well as any other type of Data. That can be helpful if you run on small storage or just want to keep regular housekeeping.
 
-## Full Usages
+This fork uses [xxHash](https://github.com/Cyan4973/xxHash) instead of MD5 for performance reasons (see [Speed comparison](#speed-comparison)).
+Note that xxHash is not a cryptographic hash function and therefore may produce collisions. That's why the checksum is composed of the xxHash Digest and the filesize.
+
+## Usage
 
 ```console
 Usage: sherly -f inputfolder1 inputfolder2 inputfolder3 [options]...
@@ -30,11 +35,26 @@ mvn package assembly:single
 ## Supported Platforms
 
 | OS                |    Working     | Version |
-| :----:            |:--------------:|:-------:|
-| Linux             |      Yes       |  1.0    |
-| Windows 10/11/8/7 | Not yet tested | |
-| BSD               | Not yet tested | |
+| ----------------- | :------------: | ------: |
+| Linux             |      Yes       |     1.0 |
+| Windows 10/11     | Not yet tested |       - |
+| macOS             | Not yet tested |       - |
+| BSD               | Not yet tested |       - |
 
-## Screenshots
+## Speed comparison
 
-![screenshot](https://github.com/BlyDoesCoding/Sherly/blob/master/Images/screenshot?raw=true)
+I let Sherly and xxSherly find duplicates in my Music Library (containing `.wav` files) using the following commands:
+
+```bash
+time java -jar Bin/sherly.jar -n -f ~/Music/ /usr/lib
+time java -jar target/xxSherly-1.0-jar-with-dependencies.jar -n -f ~/Music/ /usr/lib
+```
+
+The timings are measured using the Linux tool `time` (`real`).
+
+|           |        Sherly |        xxSherly |
+| --------: | ------------: | --------------: |
+|  1st run  |        4.055s |          2.561s |
+|  2nd run  |        4.055s |          2.304s |
+|  3rd run  |        4.066s |          2.549s |
+|  **avg**  |    **4.059s** |      **2.471s** |