This is RyanZA's One Click Lag fix APK for the Samsung Galaxy S series.
To root your device follow instructions on XDA-developers.com
SEO: Vibrant Captivate Facinate Epic 4G I9000 LagFix SGS Galaxy S Faster Android 2.3 2.2 2.1 3.0 4.0 SGSII OCLF lag performance quadrant root speed fix benchmark gingerbread ics S2 SGS2 SGS3 S3
Just to clarify, Google forced us to remove the root ability because it violates Android's ToS. Check XDA on how to root. Once rooted you can still use this app for the lag fix!
Please note that your device must be rooted in order to use the lagfix options. Check XDA on how to root your device. This will dramatically boost your quadrant scores.