[js-perf-test] Add RegExp microbenchmarks

test/js-perf-test/JSTests.json

Index: test/js-perf-test/JSTests.json
diff --git a/test/js-perf-test/JSTests.json b/test/js-perf-test/JSTests.json
index 44b821f7b528993d01e9ab3b04a7b82498cb3412..46478170b2027987cc0461ba778fef597f88c95c 100644
--- a/test/js-perf-test/JSTests.json
+++ b/test/js-perf-test/JSTests.json
@@ -178,6 +178,55 @@
       ]
     },
     {
+      "name": "RegExp",
+      "path": ["RegExp"],
+      "main": "run.js",
+      "resources": [
+        "base_ctor.js",
+        "base_exec.js",
+        "base_flags.js",
+        "base_match.js",
+        "base_replace.js",
+        "base_search.js",
+        "base_split.js",
+        "base_test.js",
+        "base.js",
+        "ctor.js",
+        "exec.js",
+        "flags.js",
+        "match.js",
+        "replace.js",
+        "search.js",
+        "split.js",
+        "test.js",
+        "slow_exec.js",
+        "slow_flags.js",
+        "slow_match.js",
+        "slow_replace.js",
+        "slow_search.js",
+        "slow_split.js",
+        "slow_test.js",
+      ],
+      "results_regexp": "^%s\\-RegExp\\(Score\\): (.+)$",
+      "tests": [
+        {"name": "Ctor"},
+        {"name": "Exec"},
+        {"name": "Flags"},
+        {"name": "Match"},
+        {"name": "Replace"},
+        {"name": "Search"},
+        {"name": "Split"},
+        {"name": "Test"},
+        {"name": "SlowExec"},
+        {"name": "SlowFlags"},
+        {"name": "SlowMatch"},
+        {"name": "SlowReplace"},
+        {"name": "SlowSearch"},
+        {"name": "SlowSplit"},
+        {"name": "SlowTest"},
+      ]
+    },
+    {
       "name": "Scope",
       "path": ["Scope"],
       "main": "run.js",