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Is There a Performance Difference Between `while (1)` and `for(;;)` in Infinite Loops?
Published on 2024-11-07
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While (1) vs. For (;;) Speed Comparison
Amidst a lively discussion, the question arose: Does while (1) execute more swiftly than for (;;) in an infinite loop? To end the debate, the participants embarked on a detailed analysis.
Perl and GCC Results
Thorough investigation revealed that in Perl, both constructs generate identical opcodes. Similarly, in GCC, both compile to the same assembly instructions. Therefore, in these environments, the speed difference is negligible.
Conclusion
At the core of the debate lies the assertion that while (1) performs an unnecessary comparison (1 == 1). However, as demonstrated by the opcode analysis, this comparison does not occur.
While the choice between these two infinite loop constructs may not have a significant impact on performance, it's crucial to remember that optimizing the code within the loop is far more impactful.
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