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25 lines
925 B
HTML
25 lines
925 B
HTML
<html>
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<body>
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Reports multiplication of an integer value by a constant integer that can be represented as a power of two. Such
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expressions can be replaced with right or left shift operations
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for a possible performance improvement.
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<p>
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Note that this inspection is not relevant for modern JVMs (e. g.,
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HotSpot or OpenJ9) because their JIT compilers will perform this optimization.
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It might only be useful in some embedded systems where no JIT compilation is performed.
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</p>
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<p><b>Example:</b></p>
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<pre><code>
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int y = x * 4;
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</code></pre>
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<p>A quick-fix is suggested to replace the multiplication or division operation with the shift operation:</p>
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<pre><code>
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int y = x << 2;
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</code></pre>
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<!-- tooltip end -->
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<p>
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Use the option to make the inspection also report division by a power of two.
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Note that replacing a power of two division with a shift does not work for negative numbers.
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</p>
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</body>
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</html> |