# HG changeset patch
# User Kim Alvefur <zash@zash.se>
# Date 1639409913 -3600
# Node ID 337b489532b78c83ac8f7a35e0ec074886d3c6b7
# Parent  e0a8c5b1ab4f895c6a6f79295af0e7d515ac2b1b
util.format: Optimize most common integer format

A search for log formats in use points to %s being the most common,
followed by %d, so worth having a fast path for that. %g works well with
most numbers and is what Lua 5.1 and 5.2 used

diff -r e0a8c5b1ab4f -r 337b489532b7 util/format.lua
--- a/util/format.lua	Mon Dec 13 16:34:55 2021 +0100
+++ b/util/format.lua	Mon Dec 13 16:38:33 2021 +0100
@@ -69,6 +69,8 @@
 		if option == "s" and t == "string" and not arg:find("[%z\1-\31\128-\255]") then
 			-- No UTF-8 or control characters, assumed to be the common case.
 			return
+		elseif t == "number" then
+			if option == "g" or (option == "d" and num_type(arg) == "integer") then return end
 		elseif option == "s" and t ~= "string" then
 			arg = tostring(arg);
 			t = "string";