prosody
cfeb0077c9e9
util/xpcall.lua

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util/xpcall.lua @ 10571:cfeb0077c9e9

net.server_epoll: Avoid concatenating buffer with single item Saves creating a string that'll be identical to buffer[1] anyways, as well as a C function call. Depending on Lua version and length of the string, this could be reusing an interned string, but a longer one would probably be duplicated for no reason. Having exactly one item in the buffer seems like it would be fairly common, but I have not done an extensive study. If opportunistic writes are enabled then it will be even more likely. This special case could be optimized like this in table.concat but it does not look like it is.
author Kim Alvefur <zash@zash.se>
date Sat, 28 Dec 2019 06:18:58 +0100
parent 9561:cfc7b2f7251e
child 12975:d10957394a3c
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
9561
cfc7b2f7251e util.xpcall, util.compat: Add non-hacky multi-argument xpcall() for Lua 5.1
Matthew Wild <mwild1@gmail.com>
parents:
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1 local xpcall = xpcall;
cfc7b2f7251e util.xpcall, util.compat: Add non-hacky multi-argument xpcall() for Lua 5.1
Matthew Wild <mwild1@gmail.com>
parents:
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2
cfc7b2f7251e util.xpcall, util.compat: Add non-hacky multi-argument xpcall() for Lua 5.1
Matthew Wild <mwild1@gmail.com>
parents:
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3 if select(2, xpcall(function (x) return x end, function () end, "test")) ~= "test" then
cfc7b2f7251e util.xpcall, util.compat: Add non-hacky multi-argument xpcall() for Lua 5.1
Matthew Wild <mwild1@gmail.com>
parents:
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4 xpcall = require"util.compat".xpcall;
cfc7b2f7251e util.xpcall, util.compat: Add non-hacky multi-argument xpcall() for Lua 5.1
Matthew Wild <mwild1@gmail.com>
parents:
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5 end
cfc7b2f7251e util.xpcall, util.compat: Add non-hacky multi-argument xpcall() for Lua 5.1
Matthew Wild <mwild1@gmail.com>
parents:
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6
cfc7b2f7251e util.xpcall, util.compat: Add non-hacky multi-argument xpcall() for Lua 5.1
Matthew Wild <mwild1@gmail.com>
parents:
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7 return {
cfc7b2f7251e util.xpcall, util.compat: Add non-hacky multi-argument xpcall() for Lua 5.1
Matthew Wild <mwild1@gmail.com>
parents:
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8 xpcall = xpcall;
cfc7b2f7251e util.xpcall, util.compat: Add non-hacky multi-argument xpcall() for Lua 5.1
Matthew Wild <mwild1@gmail.com>
parents:
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9 };