Long Searches static xpressivedynamic xpressiveBoostExpression 1(0.0263s)1(0.0263s)1.78(0.0469s)Twain 1(0.0234s)1(0.0234s)1.79(0.042s)Huck[[:alpha:]]+ 1.84(1.26s)2.21(1.51s)1(0.687s)[[:alpha:]]+ing 1.09(0.192s)2(0.351s)1(0.176s)^[^ ]*?Twain 1.41(0.08s)1.21(0.0684s)1(0.0566s)Tom|Sawyer|Huckleberry|Finn 1.56(0.195s)1.12(0.141s)1(0.125s)(Tom|Sawyer|Huckleberry|Finn).{0,30}river|river.{0,30}(Tom|Sawyer|Huckleberry|Finn)