Testing Unsynchronised hash table, one thread:
  Finished in 2.64 seconds
Testing Boxed hash table, one thread:
  Finished in 3.26 seconds
Testing Boxed hash table, five threads:
  Finished in 7.20 seconds
  Finished in 7.32 seconds
  Finished in 7.41 seconds
  Finished in 7.41 seconds
  Finished in 7.41 seconds
Testing Synchronised hash table, one thread:
  Finished in 3.81 seconds
Testing Synchronised hash table, five threads:
  Finished in 10.00 seconds
  Finished in 10.09 seconds
  Finished in 10.09 seconds
  Finished in 10.19 seconds
  Finished in 10.21 seconds
  
With Luckless:
  
Testing Concurrent hash table, one thread:
  Finished in 2.77 seconds
Testing Concurrent hash table, five threads:
  Finished in 0.69 seconds
  Finished in 0.70 seconds
  Finished in 1.02 seconds
  Finished in 1.17 seconds
  Finished in 1.33 seconds
  (This adds up to 4.91s of total CPU time.)
  
With the old "segmented" hash table:

Testing Concurrent hash table, one thread:
  Finished in 3.20 seconds
Testing Concurrent hash table, five threads:
  Finished in 1.39 seconds
  Finished in 1.40 seconds
  Finished in 1.40 seconds
  Finished in 1.42 seconds
  Finished in 1.42 seconds
  (This adds up to 7.03s of total CPU time.)