See the referenced thread. I later implemented a partial SSE version as well (merge using SSE, scan not optimized). Result: 

Total 301068 elements in 30 vectors
timethis for 5:  5 wallclock secs ( 5.31 usr +  0.00 sys =  5.31 CPU) 
+@ 439.36/s (n=2333)

[download]
Update: 
Total 200752 elements in 4 vectors
timethis for 5:  6 wallclock secs ( 5.28 usr +  0.00 sys =  5.28 CPU) 
+@ 1326.33/s (n=7003)

[download]
Update2: Right you are, BrowserUk, I was considering small n case only. 
Total 50063728 elements in 1000 vectors
timethis for 5:  6 wallclock secs ( 6.32 usr +  0.00 sys =  6.32 CPU) 
+@  0.63/s (n=4)

[download]

In reply to Re^3: Fast algorithm for 2d array queries by oiskuu
in thread Fast algorithm for 2d array queries by baxy77bax

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