Results without WRAP_ITK_EXPLICIT option turned

real  495m39.658s
user  467m5.262s
sys  26m47.946s
Size of bin directory: 1.47 GB on disk (1,464,482,904 bytes) for 1,244 items

Results with WRAP_ITK_EXPLICIT option turned

real  481m29.358s 
user  452m50.677s
sys  27m22.417s
Size of bin directory: 1.47 GB on disk (1,464,482,904 bytes) for 1,244 items

So, as we see, the difference is as much as 15 minutes.

Results with WRAP_ITK_EXPLICIT option turned ON

real	  481m29.358s
user 452m50.677s
sys	27m22.417s
Size of bin directory: 1.47 GB on disk (1,464,482,904 bytes) for 1,244 items

As we see here, the time difference is as much as 15 minutes.

ITK/Release 4/Wrapping/WrapITK Installation/Wrap ITK EXPLICIT