Long Searches static xpressivedynamic xpressiveBoostExpression 1(0.019s)1(0.019s)2.98(0.0566s)Twain 1(0.0176s)1(0.0176s)3.17(0.0556s)Huck[[:alpha:]]+ 3.62(1.78s)3.97(1.95s)1(0.492s)[[:alpha:]]+ing 2.32(0.344s)3.06(0.453s)1(0.148s)^[^ ]*?Twain 1(0.0576s)1.05(0.0606s)1.15(0.0664s)Tom|Sawyer|Huckleberry|Finn 1.24(0.164s)1.44(0.191s)1(0.133s)(Tom|Sawyer|Huckleberry|Finn).{0,30}river|river.{0,30}(Tom|Sawyer|Huckleberry|Finn)