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								<h3><a name="p-32871-release-v050httpsgithubcommischovmeeseeksreleasestagv050-1" class="anchor" href="#p-32871-release-v050httpsgithubcommischovmeeseeksreleasestagv050-1" aria-label="Heading link" rel="nofollow"></a>Release <a href="https://github.com/mischov/meeseeks/releases/tag/v0.5.0" rel="noopener nofollow ugc">v0.5.0</a></h3>
<h4><a name="p-32871-xpath-selectorshttpshexdocspmmeeseeksmeeseeksxpathhtml-2" class="anchor" href="#p-32871-xpath-selectorshttpshexdocspmmeeseeksmeeseeksxpathhtml-2" aria-label="Heading link" rel="nofollow"></a><a href="https://hexdocs.pm/meeseeks/Meeseeks.XPath.html" rel="noopener nofollow ugc">XPATH SELECTORS!</a></h4>
<p>They weren’t particularly easy to implement, but the library is stronger for the work that went into them. I doubled my test count trying to make sure the implementation was accurate, but XPath is… interesting and there’s every chance a few slipped by, so let me know if you find one.</p>
<p>Fun fact- in XPath 1.0 it’s valid to take a substring starting at <code>-INFINITY</code> and continuing for <code>INFINITY</code> characters.</p>
<p>This release also fixes some bugs related to element namespaces and a bug related to lack of <code>html5ever</code> version limits that was causing compilation problems for <code>meeseeks_html5ever</code>.</p> 
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								<p>I would be really interested in seeing benchmarks of these taken while Phoenix is also being hit with a benchmark. Since BEAM does such a good job of balancing concerns I’m interested to see the effect on web requests when the server is running heavy workloads with a NIF.</p> 
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								<p>Very excited about the xpath support. Thank you!</p> 
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								<p>Those results would depend entirely how well behaved the nif is. In the case of meeseeks,  I think it shouldn’t behave very differently from a normal elixir library as it uses a thread pool for parsing, so the impact on the BEAM scheduler should be minimal.</p> 
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								<p>What <a class="mention" href="/u/zambal" rel="nofollow">@zambal</a> said.</p>
<p><code>meeseeks_html5ever</code> parses most HTML (all but the smallest) on non-Erlang threads before sending the result to the appropriate process, so it shouldn’t interfere with the BEAM scheduler.</p> 
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								<p>I added XPath versions to this <a href="https://github.com/mischov/meeseeks_floki_bench" rel="noopener nofollow ugc">Meeseeks vs. Floki benchmark</a>.</p>
<p>Results generally suggest XPath selectors are a little slower than CSS selectors, but not so much slower that one should feel bad about using XPath selectors.</p>
<p>What makes a fast XPath selector is different than what makes a fast CSS selector, however. Avoiding early filters and providing elements (ie. <code>div</code>) instead of wildcards before filters are both simple ways to improve XPath performance.</p> 
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								<h3><a name="p-33840-release-v060httpsgithubcommischovmeeseeksreleasestagv060-1" class="anchor" href="#p-33840-release-v060httpsgithubcommischovmeeseeksreleasestagv060-1" aria-label="Heading link" rel="nofollow"></a>Release <a href="https://github.com/mischov/meeseeks/releases/tag/v0.6.0" rel="noopener nofollow ugc">v0.6.0</a></h3>
<p>The largest change is the addition of <code>Meeseeks.select</code>, which allows users to provide a custom <a href="https://hexdocs.pm/meeseeks/Meeseeks.Accumulator.html" rel="noopener nofollow ugc"><code>Meeseeks.Accumulator</code></a>.</p>
<p>Users should probably stick with <code>Meeseeks.all</code> or <code>Meeseeks.one</code> unless they have a very good reason to need a custom accumulator, but <code>Meeseeks.select</code> is another step forward in making Meeseeks as flexible as possible.</p>
<p>I also added a <code>Document.ProcessingInstruction</code> node type which will never occur if you’re parsing HTML with <code>meeseeks_html5ever</code> (because in HTML5 processing instructions are parsed as comments), but which will occur if you’re parsing from a tuple-tree with <code>{:pi, ...}</code> nodes. I also updated XPath selectors to properly work with <code>Document.ProcessingInstruction</code> nodes.</p> 
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								<h3><a name="p-35683-release-v070httpsgithubcommischovmeeseeksreleasestagv070-1" class="anchor" href="#p-35683-release-v070httpsgithubcommischovmeeseeksreleasestagv070-1" aria-label="Heading link" rel="nofollow"></a>Release <a href="https://github.com/mischov/meeseeks/releases/tag/v0.7.0" rel="noopener nofollow ugc">v0.7.0</a></h3>
<p>Meeseeks now ships with a permissive XML parser based on <code>xml5ever</code>.</p>
<pre data-code-wrap="elixir"><code class="lang-elixir">Meeseeks.parse("&lt;random&gt;XML&lt;/random&gt;", :xml)
</code></pre>
<p>I also updated <code>Meeseeks.data/1</code> so that it gets the data from CDATA nodes that were (correctly) parsed as comments by the <code>html5ever</code> parser.</p> 
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<img alt="" width="24" height="24" src="https://forum.elixirforum.com/user_avatar/forum.elixirforum.com/mischov/48/2489_2.png" class="avatar"> mischov:</div>
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<p>Meeseeks now ships with a permissive XML parser based on xml5ever.</p>
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<p>Ooo, general XML with selectors?  I may have use for this.  <img src="https://forum.elixirforum.com/images/emoji/apple/slight_smile.png?v=15" title=":slight_smile:" class="emoji" alt=":slight_smile:" loading="lazy" width="20" height="20"></p> 
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<img alt="" width="24" height="24" src="https://forum.elixirforum.com/user_avatar/forum.elixirforum.com/overminddl1/48/2677_2.png" class="avatar"> OvermindDL1:</div>
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<p>Ooo, general XML with selectors?</p>
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<p>Yep- parses the XML into a <code>Meeseeks.Document</code>, so CSS or XPath (or custom) selectors just work.</p>
<p>I saw people trying to parse XML with Floki or Meeseeks because they were readily available and easy to use, and it was driving me a bit crazy because the html5ever parser in particular is awful at parsing XML, so to preserve my sanity I added an XML parser.</p> 
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