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  • $\begingroup$ Although, I'm not sure why, ToExpression["{" <> StringReplace[str, "\t" -> ", "] <> "}"] seems to be a tad faster than both StringSplit and StringToDouble methods. $\endgroup$ Commented Sep 2, 2012 at 23:06
  • $\begingroup$ @kale probably because you are only searching for /t, and not for the other possible string separators Whitespace is taken to include spaces, tabs and newlines. $\endgroup$ Commented Sep 2, 2012 at 23:09
  • $\begingroup$ @kale, not clearly faster than StringToDouble in my test. Also probably because there's only one string to expression conversion there $\endgroup$ Commented Sep 2, 2012 at 23:10
  • $\begingroup$ @Rojo, Yeah, we're not talking much, but consistently a little faster on my machine. $\endgroup$ Commented Sep 2, 2012 at 23:11