diff --git a/benchmarks/dates/bench-dates.sh b/benchmarks/dates/bench-dates.sh
index 9812222..14ee2b3 100755
--- a/benchmarks/dates/bench-dates.sh
+++ b/benchmarks/dates/bench-dates.sh
@@ -2,4 +2,4 @@
 hyperfine --warmup 10 --export-json=results.json \
   './sqlite-regex.sh' \
   './regexp.sh' \
-  './sqlean-re.sh'
+  './sqlean-re.sh' 
\ No newline at end of file
diff --git a/benchmarks/dates/regexp.sh b/benchmarks/dates/regexp.sh
index 63fb262..9fc16f8 100755
--- a/benchmarks/dates/regexp.sh
+++ b/benchmarks/dates/regexp.sh
@@ -1,3 +1,3 @@
 #!/bin/bash
 sqlite3 test.db '.load ../regexp' \
-  'select count(*) from corpus where line regexp "([0-9])([0-9])([0-9])([0-9])-([0-9])([0-9])-([0-9])([0-9])"'
\ No newline at end of file
+  'select count(*) from corpus where line regexp "[0-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9]"'
\ No newline at end of file
diff --git a/benchmarks/dates/results.json b/benchmarks/dates/results.json
index fe8df86..7c5ae83 100644
--- a/benchmarks/dates/results.json
+++ b/benchmarks/dates/results.json
@@ -2,122 +2,105 @@
   "results": [
     {
       "command": "./sqlite-regex.sh",
-      "mean": 0.054372564830784335,
-      "stddev": 0.0005315813126198082,
-      "median": 0.054373242870000005,
-      "user": 0.04359116519607843,
-      "system": 0.005847851078431375,
-      "min": 0.05331200287000001,
-      "max": 0.055514036870000005,
+      "mean": 0.11267520686500002,
+      "stddev": 0.029391610330499925,
+      "median": 0.10629417782500002,
+      "user": 0.08536712000000002,
+      "system": 0.011847024999999997,
+      "min": 0.102419562825,
+      "max": 0.252516121825,
       "times": [
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-        0.05409116287,
-        0.05445735787000001,
-        0.053842791870000004,
-        0.05448646387,
-        0.055514036870000005,
-        0.05400693587,
-        0.055154393870000006,
-        0.05416289187000001,
-        0.05395684287000001,
-        0.054107605870000006,
-        0.054620449870000004,
-        0.05519709887,
-        0.05398021787000001,
-        0.054373242870000005,
-        0.05487026887,
-        0.053872738870000006,
-        0.05497840687,
-        0.05343802787,
-        0.053459206870000005,
-        0.054260989870000005,
-        0.053631891870000004,
-        0.054111958870000004,
-        0.05395722287,
-        0.05451430587,
-        0.053698185870000005,
-        0.05438437687000001,
-        0.055285750870000004,
-        0.054758866870000006,
-        0.05426507387000001,
-        0.05491254887,
-        0.05534420587,
-        0.05383498087000001,
-        0.05445113287,
-        0.054479982870000006,
-        0.05331200287000001,
-        0.05429368687,
-        0.054001591870000004,
-        0.05479302087000001,
-        0.05374784187000001,
-        0.054810163870000005,
-        0.054740056870000005,
-        0.05444112887,
-        0.054216403870000006,
-        0.05425796587,
-        0.055065487870000006,
-        0.054823834870000004,
-        0.05469258987,
-        0.053751407870000004,
-        0.05397611387,
-        0.05447606287
+        0.10913872782500002,
+        0.10526252182500001,
+        0.10815751282500001,
+        0.10531610382500001,
+        0.105438179825,
+        0.11364773382500001,
+        0.10658175582500001,
+        0.10662998982500001,
+        0.107044779825,
+        0.10425893182500001,
+        0.10836027982500002,
+        0.10422059082500001,
+        0.252516121825,
+        0.11496441782500001,
+        0.10379165082500001,
+        0.10360743082500001,
+        0.10702090782500001,
+        0.10251035782500001,
+        0.10366562882500001,
+        0.10629417782500002,
+        0.104358793825,
+        0.102419562825,
+        0.10682055282500001,
+        0.10597068082500001,
+        0.11888277982500002
       ]
     },
     {
       "command": "./regexp.sh",
-      "mean": 0.12548822508739133,
-      "stddev": 0.0011727640357036106,
-      "median": 0.12519553887,
-      "user": 0.11441889239130433,
-      "system": 0.005927785434782608,
-      "min": 0.12384031187,
-      "max": 0.12927648487,
+      "mean": 0.25997581682500004,
+      "stddev": 0.024898321763919803,
+      "median": 0.249294825825,
+      "user": 0.22347412000000003,
+      "system": 0.013309364999999998,
+      "min": 0.241774834825,
+      "max": 0.319424051825,
       "times": [
-        0.12521587087,
-        0.12384031187,
-        0.12480195587000001,
-        0.12549902687,
-        0.12601430687,
-        0.12481248987000002,
-        0.12519553887,
-        0.12638769587,
-        0.12604039187000002,
-        0.12426679487,
-        0.12513222387,
-        0.12517647987,
-        0.12433811687000002,
-        0.12591836487000002,
-        0.12578433887,
-        0.12568511887,
-        0.12763933087,
-        0.12493951187000002,
-        0.12609870087,
-        0.12927648487,
-        0.12427449287,
-        0.12492496587000002,
-        0.12496666287
+        0.290193496825,
+        0.319424051825,
+        0.241774834825,
+        0.256489086825,
+        0.249630323825,
+        0.247342144825,
+        0.246143203825,
+        0.251682829825,
+        0.24895932782500002,
+        0.24811886782500003
       ]
     },
     {
       "command": "./sqlean-re.sh",
-      "mean": 0.35747110417000005,
-      "stddev": 0.019674148400044274,
-      "median": 0.34542798687,
-      "user": 0.3338626749999999,
-      "system": 0.006953555,
-      "min": 0.34252614387,
-      "max": 0.39998933287,
+      "mean": 0.439621356325,
+      "stddev": 0.007868634482063867,
+      "median": 0.43852355232500007,
+      "user": 0.4151294200000001,
+      "system": 0.012904165,
+      "min": 0.427948924825,
+      "max": 0.452410292825,
       "times": [
-        0.36573534187,
-        0.36690300387,
-        0.34263379087,
-        0.34604847087,
-        0.37801525287,
-        0.39998933287,
-        0.34252614387,
-        0.34459688187,
-        0.34480750287,
-        0.34345531987
+        0.43873102282500004,
+        0.43592116482500004,
+        0.44692509282500004,
+        0.431044881825,
+        0.427948924825,
+        0.43831608182500004,
+        0.433394053825,
+        0.44546314882500004,
+        0.446058898825,
+        0.452410292825
+      ]
+    },
+    {
+      "command": "./sqlean-re-old.sh",
+      "mean": 0.792800548725,
+      "stddev": 0.14631192742771013,
+      "median": 0.702050492825,
+      "user": 0.67282412,
+      "system": 0.017852265,
+      "min": 0.688680482825,
+      "max": 1.043339850825,
+      "times": [
+        0.704442968825,
+        1.010896312825,
+        0.945591040825,
+        0.759589707825,
+        0.6903072868250001,
+        0.6887304818250001,
+        0.6996580168250001,
+        0.6967693378250001,
+        1.043339850825,
+        0.688680482825
       ]
     }
   ]
diff --git a/benchmarks/dates/sqlean-re.sh b/benchmarks/dates/sqlean-re.sh
index b483de5..1dfbc2b 100755
--- a/benchmarks/dates/sqlean-re.sh
+++ b/benchmarks/dates/sqlean-re.sh
@@ -1,3 +1,3 @@
 #!/bin/bash
 sqlite3 test.db '.load ../re' \
-  'select count(*) from corpus where line regexp "([0-9])([0-9])([0-9])([0-9])-([0-9])([0-9])-([0-9])([0-9])"'
\ No newline at end of file
+  'select count(*) from corpus where line regexp "[0-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9]"'
\ No newline at end of file
diff --git a/benchmarks/random/bench.sh b/benchmarks/random/bench.sh
new file mode 100755
index 0000000..9812222
--- /dev/null
+++ b/benchmarks/random/bench.sh
@@ -0,0 +1,5 @@
+#!/bin/bash
+hyperfine --warmup 10 --export-json=results.json \
+  './sqlite-regex.sh' \
+  './regexp.sh' \
+  './sqlean-re.sh'
diff --git a/benchmarks/random/regexp.sh b/benchmarks/random/regexp.sh
new file mode 100755
index 0000000..d80d146
--- /dev/null
+++ b/benchmarks/random/regexp.sh
@@ -0,0 +1,3 @@
+#!/bin/bash
+sqlite3 test.db '.load ../regexp' \
+  'select count(*) from strings where val regexp "1[3-4]";'
\ No newline at end of file
diff --git a/benchmarks/random/results.json b/benchmarks/random/results.json
new file mode 100644
index 0000000..4a671bf
--- /dev/null
+++ b/benchmarks/random/results.json
@@ -0,0 +1,78 @@
+{
+  "results": [
+    {
+      "command": "./sqlite-regex.sh",
+      "mean": 0.1742572313175,
+      "stddev": 0.005392827326259962,
+      "median": 0.17231639638000001,
+      "user": 0.15581114999999998,
+      "system": 0.011448619999999998,
+      "min": 0.16904181338000002,
+      "max": 0.18774281538,
+      "times": [
+        0.17320623738000002,
+        0.16904181338000002,
+        0.17510701938000003,
+        0.17113916838,
+        0.17024163138,
+        0.17161788338000003,
+        0.17057605138,
+        0.16998865538000002,
+        0.17301490938000003,
+        0.17995066838,
+        0.18774281538,
+        0.18327223138,
+        0.17813933638,
+        0.17435727538,
+        0.17055851538000003,
+        0.17016148938000003
+      ]
+    },
+    {
+      "command": "./regexp.sh",
+      "mean": 0.2273043020466667,
+      "stddev": 0.004043807716351632,
+      "median": 0.22712539788000002,
+      "user": 0.20874265,
+      "system": 0.012063078333333331,
+      "min": 0.22283077438,
+      "max": 0.23762479038000003,
+      "times": [
+        0.22706372238000003,
+        0.22446529338,
+        0.22395511738,
+        0.22360731238000003,
+        0.23106041838000002,
+        0.22718707338000002,
+        0.22843294638000003,
+        0.22829566938,
+        0.23762479038000003,
+        0.22283077438,
+        0.22536540038000002,
+        0.22776310638000002
+      ]
+    },
+    {
+      "command": "./sqlean-re.sh",
+      "mean": 0.28892881498,
+      "stddev": 0.005089316670240326,
+      "median": 0.28804239438,
+      "user": 0.27235390000000004,
+      "system": 0.011376695,
+      "min": 0.28380435538000004,
+      "max": 0.30253571438000004,
+      "times": [
+        0.28941750838,
+        0.28637030138,
+        0.28909260038,
+        0.28643868938,
+        0.30253571438000004,
+        0.28833422538000003,
+        0.28631053438000004,
+        0.28775056338000005,
+        0.28380435538000004,
+        0.28923365738
+      ]
+    }
+  ]
+}
diff --git a/benchmarks/random/sqlean-re.sh b/benchmarks/random/sqlean-re.sh
new file mode 100755
index 0000000..17ad1d8
--- /dev/null
+++ b/benchmarks/random/sqlean-re.sh
@@ -0,0 +1,3 @@
+#!/bin/bash
+sqlite3 test.db '.load ../re' \
+  'select count(*) from strings where val regexp "1[3-4]";'
\ No newline at end of file
diff --git a/benchmarks/random/sqlite-regex.sh b/benchmarks/random/sqlite-regex.sh
new file mode 100755
index 0000000..13fe822
--- /dev/null
+++ b/benchmarks/random/sqlite-regex.sh
@@ -0,0 +1,3 @@
+#!/bin/bash
+sqlite3 test.db '.load ../../dist/release/regex0' \
+  'select count(*) from strings where val regexp "1[3-4]";'
\ No newline at end of file