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118 lines
4.5 KiB
118 lines
4.5 KiB
11 months ago
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<!DOCTYPE html>
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<html lang="en">
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<meta http-equiv="X-UA-Compatible" content="IE=edge">
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<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1, viewport-fit=cover">
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<title>Julio Biason .Me 4.3</title>
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<link rel="stylesheet" href="https://blog.juliobiason.me/print.css" media="print">
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</head>
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<body class=" ">
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<div class="sidebar">
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<div class="container sidebar-sticky">
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<div class="sidebar-about">
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<a href="https://blog.juliobiason.me"><h1>Julio Biason .Me 4.3</h1></a>
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<p class="lead">Old school dev living in a 2.0 dev world</p>
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</div>
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<ul class="sidebar-nav">
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<li class="sidebar-nav-item"><a href="/">English</a></li>
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<li class="sidebar-nav-item"><a href="/pt">Português</a></li>
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<li class="sidebar-nav-item"><a href="/tags">Tags (EN)</a></li>
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<li class="sidebar-nav-item"><a href="/pt/tags">Tags (PT)</a></li>
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</ul>
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<div class="content container">
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<div class="post">
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<h1 class="post-title">Things I Learnt The Hard Way - Optimization Is For Compilers</h1>
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<span class="post-date">
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2019-07-15
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<a href="https://blog.juliobiason.me/tags/books/">#books</a>
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<a href="https://blog.juliobiason.me/tags/things-i-learnt/">#things i learnt</a>
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<a href="https://blog.juliobiason.me/tags/optimization/">#optimization</a>
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</span>
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<p>Let say you need more performance on your application. You may be tempted to
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look at your code and think "How can I keep this same logic and still remove a
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few cycles, so things seem to go faster?" Well, if you want performance, you
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need to change your logic.</p>
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<span id="continue-reading"></span>
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<p>But before jumping into the code, you may have to check your compiler options.
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Maybe you're not generating the optimized version. Maybe there is an option
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that you don't use that you can remove from the compilation.</p>
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<p>'Cause "optimization" is what a compiler is for. They <em>know</em> where they can
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extract most of the underlying architecture, and people have been finding ways
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to make the compiled code more performance for decades. Heck, compilers can
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even <em>delete</em> parts of your code 'cause they can "see" that a piece of code
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will always produce the same result and, thus, isn't necessary and they will
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just put the same result where that piece of code was.</p>
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<p>What you need to do is to think about a better <em>design</em> for your code, not how
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to improve the current code. And trying to trick the compiler by <a href="/books/things-i-learnt/data-types">messing with
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the types</a>, although may produce faster
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code, will really screw you in the future -- specially cause maintenance and
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code understanding will take long and figuring out what went wrong will always
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be harder.</p>
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<p>Code is written for humans to read. <em>ALWAYS</em>. Optimization is what compilers
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do. So find a smarter way to explain what you're trying to do instead of using
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shorter words or messing with that your code is saying.</p>
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<div>
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<div style="float:left">
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<< <a href="/books/things-i-learnt/use-utf8">Always Use UTF-8 For Your Strings</a>
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</div>
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<div style="float:right">
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<a href="/books/things-i-learnt/units">Units Makes Things Clear</a> >>
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</div>
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</div>
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</div>
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</body>
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</html>
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