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Posted to dev@any23.apache.org by "Hans Brende (JIRA)" <ji...@apache.org> on 2018/04/02 17:27:00 UTC
[jira] [Assigned] (ANY23-336) Parsing json-ld content takes
prohibitively long time
[ https://issues.apache.org/jira/browse/ANY23-336?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Hans Brende reassigned ANY23-336:
---------------------------------
Assignee: Hans Brende (was: Peter Ansell)
> Parsing json-ld content takes prohibitively long time
> -----------------------------------------------------
>
> Key: ANY23-336
> URL: https://issues.apache.org/jira/browse/ANY23-336
> Project: Apache Any23
> Issue Type: Bug
> Components: core, extractors
> Affects Versions: 2.2
> Reporter: Hans Brende
> Assignee: Hans Brende
> Priority: Critical
> Fix For: 2.3
>
> Attachments: Screen Shot 2018-03-27 at 2.52.15 PM.png, Screen Shot 2018-03-27 at 2.54.43 PM.png
>
>
> Using the page [https://www.guthriegreen.com|https://www.guthriegreen.com/] as a benchmark, a page fetch took about 100 ms, while simply *parsing* the json-ld content on that page took a *staggering 27400 ms*. For reference, I'm using Java 8, build 162, on a Macbook Pro (early 2015).
> The bad news is that this is not our fault.
> I've profiled this behavior down to the {{com.github.jsonldjava.utils.JsonUtils.fromURL(URL, CloseableHttpClient)}} function. 94% of the parsing time is spent there. This function is called when trying to load remote json-ld contexts.
> In order to avoid loading remote contexts repeatedly, this function tries to *cache* them by using a {{CachingHttpClient}} from the httpclient-osgi library.
> Unfortunately, that strategy is *not* working, as I have recorded exactly *zero* cache hits, meaning that *every* retrieval is a cache miss and a remote context is re-fetched via http every single time it's accessed.
>
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