prosody
735b8f4a6d7e
spec/scansion/lastactivity.scs

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spec/scansion/lastactivity.scs @ 11661:735b8f4a6d7e

net.http: Send entire HTTP request header as one write When opportunistic writes are enabled this reduces the number of syscalls and TCP packets sent on the wire. Experiments with TCP Fast Open made this even more obvious. That table trick probably wasn't as efficient. Lua generates bytecode for a table with zero array slots and space for two entries in the hash part, plus code to set [2] and [4]. I didn't verify but I suspect it would have had to resize the table when setting [1] and [3], although probably only once. Concatenating the strings directly in Lua is easier to read and involves no extra table or function call.
author Kim Alvefur <zash@zash.se>
date Thu, 08 Jul 2021 18:21:59 +0200
parent 10732:f5d88ad24b30
child 13405:c8f3cfe59e90
line wrap: on
line source

# XEP-0012: Last Activity / mod_lastactivity

[Client] Romeo
	jid: romeo@localhost
	password: password

-----

Romeo connects

Romeo sends:
	<presence>
		<status>Hello</status>
	</presence>

Romeo receives:
	<presence from="${Romeo's full JID}">
		<status>Hello</status>
	</presence>

Romeo sends:
	<presence type="unavailable">
		<status>Goodbye</status>
	</presence>

Romeo receives:
	<presence from="${Romeo's full JID}" type="unavailable">
		<status>Goodbye</status>
	</presence>

# mod_lastlog saves time + status message from the last unavailable presence

Romeo sends:
	<iq id='a' type='get'>
		<query xmlns='jabber:iq:last'/>
	</iq>

Romeo receives:
	<iq type='result' id='a'>
		<query xmlns='jabber:iq:last' seconds='0'>Goodbye</query>
	</iq>

Romeo disconnects

# recording ended on 2020-04-20T14:39:47Z