Serializing collections
Serializing collections
- Subject: Serializing collections
- From: Miguel Arroz <email@hidden>
- Date: Thu, 7 Feb 2008 17:31:01 +0000
Hi!
I need to serialize some collection objects (NSDictionaries,
NSSets, etc) to save them in the DB. I'm doing some performance tests
based on the Chuck's book page 43 note.
I have tried with the NSPropertyListSerialization and java
Serialized stuff (as instructed on the Apple's note http://
docs.info.apple.com/article.html?artnum=75173&coll=ap).
For serializing and unserializing the same dictionary 100000k
times, I have:
NSData length: 667
String length: 326
Property list serialization took 12272 milisecs, average 0.12272
per dict.
NSData serialization took 49137 milisecs, average 0.49137 per dict.
(Note average values are in milisecs/dict, not secs/dict.
There is two things here that actually amazed me:
1) String is shorter than binary by a factor of 2;
2) String is a lot faster than binary.
I admit I was expecting the opposite.
Facing this, I ask: string serialization is faster, shorter and
human readable. Is there any dark reason why I should use binary
serialization and not text?
Yours
Miguel Arroz
Miguel Arroz
http://www.terminalapp.net
http://www.ipragma.com
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