Redo performance plots with correct multiprogrammed results.

PERFORMANCE.md

@@ -50,7 +50,9 @@ Currently the FFT benchmark shows the following results (average):
 We want to positively note that the overall trend of 'performance drops'
 We want to positively note that the overall trend of 'performance drops'
 at the hyperthreading mark is not really bad anymore, it rather
 at the hyperthreading mark is not really bad anymore, it rather
 seems similar to EMBB now (with backoff + lockfree deque + top level
 seems similar to EMBB now (with backoff + lockfree deque + top level
-reader-writers lock).
+reader-writers lock). This comes partly because the spike at 4 threads
+is lower (less performance at 4 threads). We also see better times
+on the multiprogramed system with the lock-free deque.
 
 
 This is discouraging after many tests. To see where the overhead lies
 This is discouraging after many tests. To see where the overhead lies
 we also implemented the unbalanced tree search benchmark,
 we also implemented the unbalanced tree search benchmark,