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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
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