Remove braces around single query

openresty/app.lua

@@ -14,11 +14,19 @@ return function(ngx)
 	local db = mysql:new()
 	assert(db:connect(mysqlconn))
 	local num_queries = tonumber(ngx.var.arg_queries) or 1
-	local worlds = {}
-	for i=1, num_queries do
-		local wid = random(1, 10000)
-		worlds[#worlds+1] = db:query('SELECT * FROM World WHERE id = '..wid)[1]
+	-- May seem like a stupid branch, but since we know that
+	-- at a benchmark it will always be taken one way,
+	-- it doesn't matter. For me, after a small warmup, the performance
+	-- is identical to a version without the branch
+	-- http://wiki.luajit.org/Numerical-Computing-Performance-Guide
+	if num_queries == 1 then
+		ngx.print(encode(db:query('SELECT * FROM World WHERE id = '..random(1,10000))[1]))
+	else
+		local worlds = {}
+		for i=1, num_queries do
+			worlds[#worlds+1] = db:query('SELECT * FROM World WHERE id = '..random(1,10000))[1]
+		end
+		ngx.print( encode(worlds) )
 	end
-	ngx.print( encode(worlds) )
 	db:set_keepalive(0, 256)
 end