lua拼接字符串性能分析

-- local str= '1';
-- local result = table.concat("2");
-- print(result);
-- local tt = string.sub(str, 1, -2) 
-- print(tt);
-- local strs = {};
-- for i = 1, 30000, 1 do
-- strs[i] = "helloworld";
-- end
-- local result = "";
-- local startTime = os.clock();
-- result = table.concat(strs);
-- local endTime = os.clock();
-- local useTime = endTime - startTime;
-- print("消耗时间：" .. useTime .. "s");
local strs = {};
for i = 1, 30000, 1 do
    strs[i] = "helloworld";
end
local result = "";
local startTime = os.clock();
for index, str in ipairs(strs) do
result = result .. str;
end
local endTime = os.clock();
local useTime = endTime - startTime;
print("消耗时间：" .. useTime .. "s");