Improve user experience in term of perceived performance
Improve developer experience
Examples
Apache Commons VFS: 3x throughput on normalizing URI's, from 1 million to 3 millions operations per second. Details here
Apache Commons VFS: 85% improvement on a method often called. Details here
Apache Commons VFS: 16% improvement on encoding URI's. Details here
Many hours of profiling and performance improvements on my own Japplis software
Achieved 10 seconds on the 1BRC (1 Billion Row Challenge) without using any hacks. Details here
Done some user stories at companies showing how to improve some processes by multiple times
Offers
One time presentation on how to improve performance + discussion with developers or/and architects.
One month of helping to find performance improvements. Very low hourly rate + bonus based on the performance improvements found. So if I don't find any performance improvement, you get a cheap performance audit.
One month of helping to find performance improvements. Normal freelance hourly rate, no bonuses.
Normal freelance hourly rate that continues as long as I find cost savings for the company.