I did a test run with 430 MB of the two sample lines you gave in the last post and got even worse results where Java is 6.8x faster than D.
Code: Your original program DMD : 2.054 64-bit Java: IcedTea JDK (6)A profile run without inlining using OProfile revealed statistics that come down to this (roughly):
1/10 reading the file by line 1/ 3 of the time is spend appending to arrays 1/ 2 is the regex
