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https://issues.apache.org/jira/browse/TIKA-3237?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Luís Filipe Nassif updated TIKA-3237:
-------------------------------------
Description:
There is a huge overhead in ForkParser ContentHandlerProxy and
ContentHandlerResource read/write char[]/string methods. A simple change to not
loop reading/writing each char of strings can result in speed ups of several
orders of magnitude.
Tests with ~10k small RFC822 files (22MB), 24 parsing threads, have shown parse
times below:
ForkParser off: 4s
ForkParser on: 30min
ForkParser patched: 17s
Also, there is a bug when running at least with Oracle JDK8 that, if a String
greater than 65535 chars is written, a UTFDataFormatException is thrown from
DataOutputStream.writeUTF(String) method.
was:
There is a huge overhead in ForkParser ContentHandlerProxy and
ContentHandlerResource read/write char[]/string methods. A simple change to not
loop reading/writing each char of strings can result in speed ups of several
orders of magnitude.
Tests with ~10k small RFC822 files (22MB), 24 parsing threads, have shown parse
times below:
ForkParser off: 4s
ForkParser on: 30min
ForkParser patched: 17s
Also, there is a bug when running at least with Oracle JDK8 that, if a String
greater than 65535 is written, a UTFDataFormatException is thrown from
DataOutputStream.writeUTF(String) method.
> Great optimization in ForkParser
> --------------------------------
>
> Key: TIKA-3237
> URL: https://issues.apache.org/jira/browse/TIKA-3237
> Project: Tika
> Issue Type: Improvement
> Components: core
> Affects Versions: 1.24.1
> Environment: Windows 10, Oracle JDK 1.8.0_261 x64, 24 cores
> Reporter: Luís Filipe Nassif
> Assignee: Luís Filipe Nassif
> Priority: Major
>
> There is a huge overhead in ForkParser ContentHandlerProxy and
> ContentHandlerResource read/write char[]/string methods. A simple change to
> not loop reading/writing each char of strings can result in speed ups of
> several orders of magnitude.
>
> Tests with ~10k small RFC822 files (22MB), 24 parsing threads, have shown
> parse times below:
> ForkParser off: 4s
> ForkParser on: 30min
> ForkParser patched: 17s
>
> Also, there is a bug when running at least with Oracle JDK8 that, if a String
> greater than 65535 chars is written, a UTFDataFormatException is thrown from
> DataOutputStream.writeUTF(String) method.
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