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117 lines
4.5 KiB
117 lines
4.5 KiB
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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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<li class="sidebar-nav-item"><a href="/">English</a></li> |
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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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<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 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 style="float:right"> |
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<a href="/books/things-i-learnt/units">Units Makes Things Clear</a> >> |
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