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bench: moved packets to separate files, put results in the main document

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Gabor Adam Toth 2011-05-17 12:27:07 +02:00
parent 73f3ec2393
commit e89cc6312b
19 changed files with 166 additions and 459 deletions
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1
bench/.gitignore vendored
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@ -1,3 +1,2 @@
*.html
*.pdf
packets/

17
bench/Makefile
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@ -8,22 +8,7 @@ INIT = (setq load-path (cons \"/usr/share/emacs/site-lisp/org-mode\" load-path)
org-src-preserve-indentation t) \
(require 'org-install)
ORG = benchmark.org results.org
wiki2org:
perl -pe '\
s/^= (.*) =\s*$$/#+TITLE: $$1\n/; \
s/^== (.*) ==\s*$$/* $$1/; \
s/^=== (.*) ===\s*$$/** $$1/; \
s/^{{{/#+BEGIN_SRC/; \
s/^}}}/#+END_SRC/ \
' benchmark.wiki >benchmark.org
packets:
emacs -Q --batch --eval \
"(progn ${INIT} (find-file \"benchmark.org\") \
(org-babel-tangle) (kill-buffer))"
perl -pi -e 'print "\n" unless $$p; $$p=1' packets/user_profile.psyc
ORG = benchmark.org
html:
for f in ${ORG}; do \

192
bench/benchmark.org
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@ -19,30 +19,17 @@ Since presence packets are by far the dominant messaging content
in the XMPP network, we'll start with one of them.
Here's an example from paragraph 4.4.2 of RFC 6121.
#+BEGIN_SRC xml :tangle packets/presence.xml
<presence from='juliet@example.com/balcony'
to='benvolio@example.net'>
<show>away</show>
</presence>
#+END_SRC
#+INCLUDE: packets/presence.xml src xml
And here's the same information in a JSON rendition:
#+BEGIN_SRC js :tangle packets/presence.json
["presence",{"from":"juliet@example.com/balcony","to":"benvolio@example.net"},{"show":"away"}]
#+END_SRC
#INCLUDE: packets/presence.json src js
Here's the equivalent PSYC packet in verbose form
(since it is a multicast, the single recipients do not
need to be mentioned):
#+BEGIN_SRC psyc :tangle packets/presence.psyc
:_context psyc://example.com/~juliet
=_degree_availability 4
_notice_presence
|
#+END_SRC
#+INCLUDE: packets/presence.psyc src psyc
And the same in compact form:
@ -58,133 +45,38 @@ np
XML:
#+BEGIN_SRC xml :tangle packets/chat_msg.xml
<message
from='juliet@example.com/balcony'
id='ktx72v49'
to='romeo@example.net'
type='chat'
xml:lang='en'>
<body>Art thou not Romeo, and a Montague?</body>
</message>
#+END_SRC
#+INCLUDE: packets/chat_msg.xml src xml
PSYC:
#+BEGIN_SRC psyc :tangle packets/chat_msg.psyc
:_source psyc://example.com/~juliet
:_target psyc://example.net/~romeo
_message_private
Art thou not Romeo, and a Montague?
|
#+END_SRC
#+INCLUDE: packets/chat_msg.psyc src psyc
** A new status updated activity
Example taken from http://onesocialweb.org/spec/1.0/osw-activities.html
You could call this XML namespace hell:
#+BEGIN_SRC xml :tangle packets/activity.xml
<iq type='set'
from='hamlet@denmark.lit/snsclient'
to='hamlet@denmark.lit'
id='osw1'>
<pubsub xmlns='http://jabber.org/protocol/pubsub'>
<publish node='urn:xmpp:microblog:0'>
<item>
<entry xmlns="http://www.w3.org/2005/Atom"
xmlns:activity="http://activitystrea.ms/spec/1.0/"
xmlns:osw="http://onesocialweb.org/spec/1.0/">
<title>to be or not to be ?</title>
<activity:verb>http://activitystrea.ms/schema/1.0/post</activity:verb>
<activity:object>
<activity:object-type>http://onesocialweb.org/spec/1.0/object/status</activity:object-type>
<content type="text/plain">to be or not to be ?</content>
</activity:object>
<osw:acl-rule>
<osw:acl-action permission="http://onesocialweb.org/spec/1.0/acl/permission/grant">
http://onesocialweb.org/spec/1.0/acl/action/view
</osw:acl-action>
<osw:acl-subject type="http://onesocialweb.org/spec/1.0/acl/subject/everyone"/>
</osw:acl-rule>
</entry>
</item>
</publish>
</pubsub>
</iq>
#+END_SRC
#+INCLUDE: packets/activity.xml src xml
http://activitystrea.ms/head/json-activity.html proposes a JSON encoding
of this. We'll have to add a routing header to it.
#+BEGIN_SRC js :tangle packets/activity.json
["activity",{"from":"hamlet@denmark.lit/snsclient"},{"verb":"post",
"title":"to be or not to be ?","object":{"type":"status",
"content":"to be or not to be ?","contentType":"text/plain"}}]
#+END_SRC
#+INCLUDE: packets/activity.json src js
http://about.psyc.eu/Activity suggests a PSYC mapping for activity
streams. Should a "status post" be considered equivalent to a presence
description announcement or just a message in the "microblogging" channel?
We'll use the latter here:
#+BEGIN_SRC psyc :tangle packets/activity.psyc
:_context psyc://denmark.lit/~hamlet#_follow
:_subject to be or not to be ?
:_type_content text/plain
_message
to be or not to be ?
|
#+END_SRC
#+INCLUDE: packets/activity.psyc src psyc
** A message with JSON-unfriendly characters
#+BEGIN_SRC xml :tangle packets/json-unfriendly.xml
<message
from='romeo@example.net/orchard'
id='sl3nx51f'
to='juliet@example.com/balcony'
type='chat'
xml:lang='en'>
<body>"Neither, fair saint, if either thee dislike.", he said.
And
the
rest
is
history.</body>
</message>
#+END_SRC
#+INCLUDE: packets/json-unfriendly.xml src xml
** A message with XML-unfriendly characters
#+BEGIN_SRC xml :tangle packets/xml-unfriendly.xml
<message
from='juliet@example.com/balcony'
id='z94nb37h'
to='romeo@example.net'
type='chat'
xml:lang='en'>
<body>Wherefore art thou, Romeo?</body>
<body xml:lang='cs'>
Pro&#x010D;e&#x017D; jsi ty, Romeo?
</body>
</message>
#+END_SRC
#+INCLUDE: packets/xml-unfriendly.xml src xml
** A message with PSYC-unfriendly strings
#+BEGIN_SRC xml :tangle packets/psyc-unfriendly.xml
<message
from='juliet@example.com/balcony'
id='c8xg3nf8'
to='romeo@example.net'
type='chat'
xml:lang='en'>
<subject>I implore you with a pointless
newline in a header variable</subject>
<body>Wherefore art thou, Romeo?
|
And for practicing purposes we added a PSYC packet delimiter.</body>
</message>
#+END_SRC
#+INCLUDE: packets/psyc-unfriendly.xml src xml
** A packet containing a JPEG photograph
... TBD ...
@ -194,41 +86,31 @@ In this test we'll not consider XMPP at all and simply compare the
efficiency of the three syntaxes at serializing a typical user data base
storage information. We'll again start with XML:
#+BEGIN_SRC xml :tangle packets/user_profile.xml
<UserProfile>
<Name>Silvio Berlusconi</Name>
<JobTitle>Premier</JobTitle>
<Country>I</Country>
<Address>
<Street>Via del Colosseo, 1</Street>
<PostalCode>00100</PostalCode>
<City>Roma</City>
</Address>
<Page>http://example.org</Page>
</UserProfile>
#+END_SRC
#+INCLUDE: packets/user_profile.xml src xml
In JSON this would look like this:
#+BEGIN_SRC js :tangle packets/user_profile.json
["UserProfile",{"Name":"Silvio Berlusconi","JobTitle":"Premier","Country":"I","Address":
{"Street":"Via del Colosseo, 1","PostalCode":"00100","City":"Roma"},"Page":"http://example.org"}]
#+END_SRC
#+INCLUDE: packets/user_profile.json src js
Here's a way to model this in PSYC:
#+BEGIN_SRC psyc :tangle packets/user_profile.psyc
#+INCLUDE: packets/user_profile.psyc src psyc
:_name Silvio Berlusconi
:_title_job Premier
:_country I
:_address_street Via del Colosseo, 1
:_address_code_postal 00100
:_address_city Roma
:_page http://example.org
_profile_user
|
#+END_SRC
* Results
Parsing time of 1 000 000 packets in milliseconds:
| input: | PSYC | | JSON | | | XML | |
| parser: | strlen | libpsyc | json-c | json-glib | libxml sax | libxml | rapidxml |
|-----------+--------+---------+--------+-----------+------------+--------+----------|
| presence | 30 | 246 | 2463 | 10197 | 4997 | 7557 | 1719 |
| chat msg | 41 | 320 | | | 5997 | 9777 | 1893 |
| activity | 42 | 366 | 4666 | 16846 | 13357 | 28858 | 4419 |
| user prof | 55 | 608 | 4715 | 17468 | 7350 | 12377 | 2477 |
|-----------+--------+---------+--------+-----------+------------+--------+----------|
| / | < | > | < | > | < | | > |
These tests were performed on a 2.53 GHz Intel(R) Core(TM)2 Duo P9500 CPU.
* Conclusions
... TBD ...
@ -268,3 +150,19 @@ After a month of development libpsyc is already performing pretty
well, but we presume various optimizations, like rewriting parts
in assembler, are possible.
* Appendix
** Tools used
libpsyc:
: test/testStrlen -sc 1000000 -f $file
: test/testPsycSpeed -sc 1000000 -f $file
: test/testJson -snc 1000000 -f $file
: test/testJsonGlib -snc 1000000 -f $file
xmlbench:
: parse/libxml-sax 1000000 $file
: parse/libxml 1000000 $file
: parse/rapidxml 1000000 $file

269
bench/benchmark.wiki
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@ -1,269 +0,0 @@
= libpsyc Performance Benchmarks =
In this document we present the results of performance benchmarks
of libpsyc compared with libjson-glib and libxml2.
== Procedure ==
We'll use typical messages from the XMPP ("stanzas" in Jabber
lingo) and compare them with equivalent JSON encodings,
verbose and compact PSYC formats.
In some cases we will additionally compare PSYC packets to
a more efficient XML encoding based on PSYC methods, to have
a more accurate comparison of the actual PSYC and XML
syntaxes, rather than the protocol structures of PSYC and XMPP.
== The Benchmarks ==
=== A presence packet ===
Since presence packets are by far the dominant messaging content
in the XMPP network, we'll start with one of them.
Here's an example from paragraph 4.4.2 of RFC 6121.
{{{
<presence from='juliet@example.com/balcony'
to='benvolio@example.net'>
<show>away</show>
</presence>
}}}
And here's the same information in a JSON rendition:
{{{
["presence",{"from":"juliet@example.com/balcony","to":"benvolio@example.net"},{"show":"away"}]
}}}
Here's the equivalent PSYC packet in verbose form
(since it is a multicast, the single recipients do not
need to be mentioned):
{{{
:_context psyc://example.com/~juliet
=_degree_availability 4
_notice_presence
|
}}}
And the same in compact form:
{{{
:c psyc://example.com/~juliet
=da 4
np
|
}}}
=== An average chat message ===
{{{
<message
from='juliet@example.com/balcony'
id='ktx72v49'
to='romeo@example.net'
type='chat'
xml:lang='en'>
<body>Art thou not Romeo, and a Montague?</body>
</message>
}}}
=== A new status updated activity ===
Example taken from http://onesocialweb.org/spec/1.0/osw-activities.html
You could call this XML namespace hell:
{{{
<iq type='set'
from='hamlet@denmark.lit/snsclient'
to='hamlet@denmark.lit'
id='osw1'>
<pubsub xmlns='http://jabber.org/protocol/pubsub'>
<publish node='urn:xmpp:microblog:0'>
<item>
<entry xmlns="http://www.w3.org/2005/Atom"
xmlns:activity="http://activitystrea.ms/spec/1.0/"
xmlns:osw="http://onesocialweb.org/spec/1.0/">
<title>to be or not to be ?</title>
<activity:verb>http://activitystrea.ms/schema/1.0/post</activity:verb>
<activity:object>
<activity:object-type>http://onesocialweb.org/spec/1.0/object/status</activity:object-type>
<content type="text/plain">to be or not to be ?</content>
</activity:object>
<osw:acl-rule>
<osw:acl-action permission="http://onesocialweb.org/spec/1.0/acl/permission/grant">
http://onesocialweb.org/spec/1.0/acl/action/view
</osw:acl-action>
<osw:acl-subject type="http://onesocialweb.org/spec/1.0/acl/subject/everyone"/>
</osw:acl-rule>
</entry>
</item>
</publish>
</pubsub>
</iq>
}}}
http://activitystrea.ms/head/json-activity.html proposes a JSON encoding
of this. We'll have to add a routing header to it.
{{{
["activity",{"from":"hamlet@denmark.lit/snsclient"},{"verb":"post",
"title":"to be or not to be ?","object":{"type":"status",
"content":"to be or not to be ?","contentType":"text/plain"}]
}}}
http://about.psyc.eu/Activity suggests a PSYC mapping for activity
streams. Should a "status post" be considered equivalent to a presence
description announcement or just a message in the "microblogging" channel?
We'll use the latter here:
{{{
:_context psyc://denmark.lit/~hamlet#_follow
:_subject to be or not to be ?
:_type_content text/plain
_message
to be or not to be ?
|
}}}
=== A message with JSON-unfriendly characters ===
{{{
<message
from='romeo@example.net/orchard'
id='sl3nx51f'
to='juliet@example.com/balcony'
type='chat'
xml:lang='en'>
<body>"Neither, fair saint, if either thee dislike.", he said.
And
the
rest
is
history.</body>
</message>
}}}
=== A message with XML-unfriendly characters ===
{{{
<message
from='juliet@example.com/balcony'
id='z94nb37h'
to='romeo@example.net'
type='chat'
xml:lang='en'>
<body>Wherefore art thou, Romeo?</body>
<body xml:lang='cs'>
Pro&#x010D;e&#x017D; jsi ty, Romeo?
</body>
</message>
}}}
=== A message with PSYC-unfriendly strings ===
{{{
<message
from='juliet@example.com/balcony'
id='c8xg3nf8'
to='romeo@example.net'
type='chat'
xml:lang='en'>
<subject>I implore you with a pointless
newline in a header variable</subject>
<body>Wherefore art thou, Romeo?
|
And for practicing purposes we added a PSYC packet delimiter.</body>
</message>
}}}
=== A packet containing a JPEG photograph ===
... TBD ...
=== A random data structure ===
In this test we'll not consider XMPP at all and simply compare the
efficiency of the three syntaxes at serializing a typical user data base
storage information. We'll again start with XML:
{{{
<UserProfile>
<Name>Silvio Berlusconi</Name>
<JobTitle>Premier</JobTitle>
<Country>I</Country>
<Address>
<Street>Via del Colosseo, 1</Street>
<PostalCode>00100</PostalCode>
<City>Roma</City>
</Address>
<Page>http://example.org</Page>
</UserProfile>
}}}
In JSON this would look like this:
{{{
["UserProfile",{"Name":"Silvio Berlusconi","JobTitle":"Premier","Country":"I","Address":
{"Street":"Via del Colosseo, 1","PostalCode":"00100","City":"Roma"},"Page":"http://example.org"}]
}}}
Here's a way to model this in PSYC:
{{{
:_name Silvio Berlusconi
:_title_job Premier
:_country I
:_address_street Via del Colosseo, 1
:_address_code_postal 00100
:_address_city Roma
:_page http://example.org
_profile_user
|
}}}
== Conclusions ==
... TBD ...
== Criticism ==
Are we comparing apples and oranges? Yes and no, depends on what you
need. XML is a syntax best suited for complex structured data in
well-defined formats - especially good for text mark-up. JSON is a syntax
intended to hold arbitrarily structured data suitable for immediate
inclusion in javascript source codes. The PSYC syntax is an evolved
derivate of RFC 822, the syntax used by HTTP and E-Mail, and is therefore
limited in the kind and depth of data structures that can be represented
with it, but in exchange it is highly performant at doing just that.
So it is up to you to find out which of the three formats fulfils your
requirements the best. We use PSYC for the majority of messaging where
JSON and XMPP aren't efficient and opaque enough, but we employ XML and
JSON as payloads within PSYC for data that doesn't fit the PSYC model.
For some reason all three formats are being used for messaging, although
only PSYC was actually designed for that purpose.
== Caveats ==
In every case we'll compare performance of parsing and re-rendering
these messages, but consider also that the applicative processing
of an XML DOM tree is more complicated than just accessing
certain elements in a JSON data structure or PSYC variable
mapping.
For a speed check in real world conditions which also consider the
complexity of processing incoming messages we should compare
the performance of a chat client using the two protocols,
for instance by using libpurple with XMPP and PSYC accounts.
To this purpose we first need to integrate libpsyc into libpurple.
== Futures ==
After a month of development libpsyc is already performing pretty
well, but we presume various optimizations, like rewriting parts
in assembler, are possible.

3
bench/packets/activity.json Normal file
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@ -0,0 +1,3 @@
["activity",{"from":"hamlet@denmark.lit/snsclient"},{"verb":"post",
"title":"to be or not to be ?","object":{"type":"status",
"content":"to be or not to be ?","contentType":"text/plain"}}]

7
bench/packets/activity.psyc Normal file
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@ -0,0 +1,7 @@
:_context psyc://denmark.lit/~hamlet#_follow
:_subject to be or not to be ?
:_type_content text/plain
_message
to be or not to be ?
|

27
bench/packets/activity.xml Normal file
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@ -0,0 +1,27 @@
<iq type='set'
from='hamlet@denmark.lit/snsclient'
to='hamlet@denmark.lit'
id='osw1'>
<pubsub xmlns='http://jabber.org/protocol/pubsub'>
<publish node='urn:xmpp:microblog:0'>
<item>
<entry xmlns="http://www.w3.org/2005/Atom"
xmlns:activity="http://activitystrea.ms/spec/1.0/"
xmlns:osw="http://onesocialweb.org/spec/1.0/">
<title>to be or not to be ?</title>
<activity:verb>http://activitystrea.ms/schema/1.0/post</activity:verb>
<activity:object>
<activity:object-type>http://onesocialweb.org/spec/1.0/object/status</activity:object-type>
<content type="text/plain">to be or not to be ?</content>
</activity:object>
<osw:acl-rule>
<osw:acl-action permission="http://onesocialweb.org/spec/1.0/acl/permission/grant">
http://onesocialweb.org/spec/1.0/acl/action/view
</osw:acl-action>
<osw:acl-subject type="http://onesocialweb.org/spec/1.0/acl/subject/everyone"/>
</osw:acl-rule>
</entry>
</item>
</publish>
</pubsub>
</iq>

6
bench/packets/chat_msg.psyc Normal file
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@ -0,0 +1,6 @@
:_source psyc://example.com/~juliet
:_target psyc://example.net/~romeo
_message_private
Art thou not Romeo, and a Montague?
|

8
bench/packets/chat_msg.xml Normal file
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@ -0,0 +1,8 @@
<message
from='juliet@example.com/balcony'
id='ktx72v49'
to='romeo@example.net'
type='chat'
xml:lang='en'>
<body>Art thou not Romeo, and a Montague?</body>
</message>

13
bench/packets/json-unfriendly.xml Normal file
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@ -0,0 +1,13 @@
<message
from='romeo@example.net/orchard'
id='sl3nx51f'
to='juliet@example.com/balcony'
type='chat'
xml:lang='en'>
<body>"Neither, fair saint, if either thee dislike.", he said.
And
the
rest
is
history.</body>
</message>

1
bench/packets/presence.json Normal file
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@ -0,0 +1 @@
["presence",{"from":"juliet@example.com/balcony","to":"benvolio@example.net"},{"show":"away"}]

5
bench/packets/presence.psyc Normal file
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@ -0,0 +1,5 @@
:_context psyc://example.com/~juliet
=_degree_availability 4
_notice_presence
|

4
bench/packets/presence.xml Normal file
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@ -0,0 +1,4 @@
<presence from='juliet@example.com/balcony'
to='benvolio@example.net'>
<show>away</show>
</presence>

12
bench/packets/psyc-unfriendly.xml Normal file
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@ -0,0 +1,12 @@
<message
from='juliet@example.com/balcony'
id='c8xg3nf8'
to='romeo@example.net'
type='chat'
xml:lang='en'>
<subject>I implore you with a pointless
newline in a header variable</subject>
<body>Wherefore art thou, Romeo?
|
And for practicing purposes we added a PSYC packet delimiter.</body>
</message>

2
bench/packets/user_profile.json Normal file
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@ -0,0 +1,2 @@
["UserProfile",{"Name":"Silvio Berlusconi","JobTitle":"Premier","Country":"I","Address":
{"Street":"Via del Colosseo, 1","PostalCode":"00100","City":"Roma"},"Page":"http://example.org"}]

10
bench/packets/user_profile.psyc Normal file
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@ -0,0 +1,10 @@
:_name Silvio Berlusconi
:_title_job Premier
:_country I
:_address_street Via del Colosseo, 1
:_address_code_postal 00100
:_address_city Roma
:_page http://example.org
_profile_user
|

11
bench/packets/user_profile.xml Normal file
View file

@ -0,0 +1,11 @@
<UserProfile>
<Name>Silvio Berlusconi</Name>
<JobTitle>Premier</JobTitle>
<Country>I</Country>
<Address>
<Street>Via del Colosseo, 1</Street>
<PostalCode>00100</PostalCode>
<City>Roma</City>
</Address>
<Page>http://example.org</Page>
</UserProfile>

11
bench/packets/xml-unfriendly.xml Normal file
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@ -0,0 +1,11 @@
<message
from='juliet@example.com/balcony'
id='z94nb37h'
to='romeo@example.net'
type='chat'
xml:lang='en'>
<body>Wherefore art thou, Romeo?</body>
<body xml:lang='cs'>
Pro&#x010D;e&#x017D; jsi ty, Romeo?
</body>
</message>

26
bench/results.org
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@ -1,26 +0,0 @@
#+TITLE: Benchmark results
#+OPTIONS: ^:{} toc:nil
* Results
Parsing time of 1 000 000 packets in milliseconds:
| input | PSYC | | JSON | | | XML | |
| parser | strlen | libpsyc | json-c | json-glib | libxml sax | libxml | rapidxml |
|-----------+--------+---------+--------+-----------+------------+--------+----------|
| presence | 30 | 246 | 2463 | 10197 | 4997 | 7557 | 1719 |
| chat msg | 41 | 320 | | | 5997 | 9777 | 1893 |
| activity | 42 | 366 | 4666 | 16846 | 13357 | 28858 | 4419 |
| user prof | 55 | 608 | 4715 | 17468 | 7350 | 12377 | 2477 |
|-----------+--------+---------+--------+-----------+------------+--------+----------|
| / | < | > | < | > | < | | > |
* Commands used
: ./testPsycSpeed -sc 1000000 -f $file
: ./testJson -snc 1000000 -f $file
: ./testJsonGlib -snc 1000000 -f $file
: ./testStrlen -sc 1000000 -f $file
: ./rapidxml 1000000 $file
: ./libxml 1000000 $file
: ./libxml-sax 1000000 $file