Add further notes on performance development.

PERFORMANCE.md

@@ -28,7 +28,15 @@ Big improvements of about 6% in our test. This seems like a little,
 but 6% from the scheduler is a lot, as the 'main work' is the tasks
 but 6% from the scheduler is a lot, as the 'main work' is the tasks
 itself, not the scheduler.
 itself, not the scheduler.
 
 
-### Commit 18b2d744 - Performance problems with higher thread counts
+### Commit aa27064 - Performance with ttsa spinlocks (and 'full blocking' top level)
+
+<img src="media/aa27064_fft_average.png" width="600"/>
+
+### Commit d16ad3e - Performance with rw-lock and backoff
+
+<img src="media/d16ad3e_fft_average.png" width="600"/>
+
+### Commit 18b2d744 - Performance with lock-free deque
 
 
 After much tinkering we still have performance problems with higher
 After much tinkering we still have performance problems with higher
 thread counts in the FFT benchmark. Upward from 4/5 threads the
 thread counts in the FFT benchmark. Upward from 4/5 threads the

README.md

@@ -7,6 +7,8 @@
 
 
 This section will give a brief introduction on how to get a minimal
 This section will give a brief introduction on how to get a minimal
 project setup that uses the PLS library.
 project setup that uses the PLS library.
+Further [general notes](NOTES.md) and [performance notes](PERFORMANCE.md) can be found in
+their respective files.
 
 
 ### Installation
 ### Installation