Unable to load 7MB yaml file on ruboto
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Key: JRUBY-5586
URL: http://jira.codehaus.org/browse/JRUBY-5586
Project: JRuby
Issue Type: Bug
Components: Core Classes/Modules
Affects Versions: JRuby 1.6RC3
Environment: ruboto-core master 2011-03-14
jruby-jars 1.6 master 2011-03-14
Reporter: Uwe Kubosch
Fix For: JRuby 1.6.1
Attachments: message.gz
This is probably a first :)
We are porting an application from java on linux to dalvik on android.
We need to decode a 7MB yaml encoded message on an android 3.0 tablet.
We are targeting a tablet like the XOOM with dual core 1GHz cpu, 1GB RAM, and
1GB persistent storage. This hardware should easily be able to decode the
message.
We do not have the actual device, so we are testing on the Android Emulator
with a 3.0 target.
I have attached an example of a message. It is compressed, and can be
uncompressed with:
{noformat}
require 'zlib'
deflated_message = File.read("message.gz")
inflated_message = Zlib::Inflate.inflate(deflated_message)
{noformat}
This works great!
To load the resulting yaml, we call:
{noformat}
require 'yaml'
message = YAML.load(inflated_message)
{noformat}
This call never finishes when we call it on the emulator.
We have increased the "Device ram size" to 1024, and the "Max VM application
heap size" to 512, and we see heap increases to about 100MB, but no more. We
start the emulator with -partition-size 1024 so we have enough disk space
available.
It would be great to solve this, since it is the only known obstacle for our
port.
On a MacBook Pro with Apple Java, decoding finishes in 7 seconds including vm
and jruby startup:
{noformat}
uwe$ time jruby -ryaml -rzlib -e "d = File.read('message.gz'); i =
Zlib::Inflate.inflate(d) ; m = YAML.load(i)"
real 0m6.249s
user 0m6.921s
sys 0m0.409s
uwe$
As always, we are very grateful for any input on the problem.
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