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plugins/mod_ping.lua @ 12201:e5e0ab93d7f4 0.11
util.xml: Break reference to help the GC (fix #1711)
LuaExpat uses a registry reference to track handlers, which makes
it so that an upvalue like this creates a reference loop that keeps the
parser and its handlers from being garbage collected. The same issue has
affected util.xmppstream in the past.
Code for checking:
local xml_parse = require"util.xml".parse;
for i = 1, 10000 do xml_parse("<root/>") end
collectgarbage(); collectgarbage();
print(collectgarbage("count"), "KiB");
A future release of LuaExpat may fix the underlying issue there.
author | Kim Alvefur <zash@zash.se> |
---|---|
date | Thu, 20 Jan 2022 09:57:20 +0100 |
parent | 9572:867e40b82409 |
child | 10399:270cb2821566 |
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-- Prosody IM -- Copyright (C) 2008-2010 Matthew Wild -- Copyright (C) 2008-2010 Waqas Hussain -- -- This project is MIT/X11 licensed. Please see the -- COPYING file in the source package for more information. -- local st = require "util.stanza"; module:add_feature("urn:xmpp:ping"); local function ping_handler(event) return event.origin.send(st.reply(event.stanza)); end module:hook("iq-get/bare/urn:xmpp:ping:ping", ping_handler); module:hook("iq-get/host/urn:xmpp:ping:ping", ping_handler); -- Ad-hoc command local datetime = require "util.datetime".datetime; function ping_command_handler (self, data, state) -- luacheck: ignore 212 local now = datetime(); return { info = "Pong\n"..now, status = "completed" }; end module:depends "adhoc"; local adhoc_new = module:require "adhoc".new; local descriptor = adhoc_new("Ping", "ping", ping_command_handler); module:provides("adhoc", descriptor);