Just a point of benchmark. Compared to vanilla 5.6.1 (no threads),
5.8.0 (with threads) is significantly slower on some basic tasks, and
5.8.0 (no threads) is somewhat slower. Using a 10MB text file, a
simple grep script was 10% slower in 5.8.0 and 20-25% slower with
5.8.0-ithreads. More notably, a simple wc-like script was 20% slower
with 5.8.0 and a whopping 50% slower with 5.8.0-ithreads.
Anyone care to add their observations or remarks?