add lastof_perf test

1 files changed, 38 insertions, 0 deletions

diff --git a/tests/modules/string/lastof_perf.lua b/tests/modules/string/lastof_perf.lua
new file mode 100644
index 000000000..eb0c40e76
--- /dev/null
+++ b/tests/modules/string/lastof_perf.lua
@@ -0,0 +1,38 @@
+
+function _lastof_perf(str, pattern, opt)
+    local plain = opt and opt.plain
+    local dt = os.mclock()
+    for i = 0, 1000000 do
+        str:lastof(pattern, plain)
+    end
+    dt = os.mclock() - dt
+    print("lastof(%s .., %s, %s): %d ms", str:sub(1, 16), pattern, string.serialize(opt or {}, {strip = true, indent = false}), dt)
+end
+
+function main()
+
+    local str = "shortstr: 123abc123123xyz[123]+abc123"
+    _lastof_perf(str, "1")
+    _lastof_perf(str, "123")
+    _lastof_perf(str, "[123]+")
+    print("")
+
+    _lastof_perf(str, "1", {plain = true})
+    _lastof_perf(str, "123", {plain = true})
+    _lastof_perf(str, "[123]+", {plain = true})
+    print("")
+
+    str = "longstr: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
+    for i = 0, 100 do
+        str = str .. "[123]+"
+    end
+    _lastof_perf(str, "1")
+    _lastof_perf(str, "123")
+    _lastof_perf(str, "[123]+")
+    print("")
+
+    _lastof_perf(str, "1", {plain = true})
+    _lastof_perf(str, "123", {plain = true})
+    _lastof_perf(str, "[123]+", {plain = true})
+    print("")
+end