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copied!<p>A few minutes of work and you can benchmark this yourself reasonably enough to see the difference.</p> <p><strong>1.) Create a general purpose timing routine.</strong></p> <pre><code> public void RunTest(Action action, String name, Int32 iterations) { var sw = new System.Diagnostics.Stopwatch(); System.GC.Collect(); System.GC.WaitForPendingFinalizers(); sw.Start(); for(var i = 0; i<iterations; i++) { action(); } sw.Stop(); Console.Write("Name: {0},", name); Console.Write(" Iterations: {1},", iterations); Console.WriteLine(" Milliseconds: {2}", sw.ElapsedMilliseconds); } </code></pre> <p><strong>2.) Create your two test functions.</strong></p> <pre><code> public void CompareWithParseInt() { int a = 1; string b = "1"; bool isEqual = a == int.Parse(b); } public void CompareWithToString() { int a = 1; string b = "1"; bool isEqual = a.ToString() == b; } </code></pre> <p><strong>3.) Now benchmark the crap out of them.</strong></p> <pre><code>RunTest(CompareWithParseInt, "Compare With ParseInt", 1); //Name: Compare With ParseInt, Iterations: 1, Milliseconds: 0 RunTest(CompareWithParseInt, "Compare With ParseInt", 1); //Name: Compare With ParseInt, Iterations: 1, Milliseconds: 0 RunTest(CompareWithParseInt, "Compare With ParseInt", 10); //Name: Compare With ParseInt, Iterations: 10, Milliseconds: 0 RunTest(CompareWithParseInt, "Compare With ParseInt", 100); //Name: Compare With ParseInt, Iterations: 100, Milliseconds: 0 RunTest(CompareWithParseInt, "Compare With ParseInt", 1000); //Name: Compare With ParseInt, Iterations: 1000, Milliseconds: 0 RunTest(CompareWithParseInt, "Compare With ParseInt", 100000); //Name: Compare With ParseInt, Iterations: 100000, Milliseconds: 12 RunTest(CompareWithParseInt, "Compare With ParseInt", 1000000); //Name: Compare With ParseInt, Iterations: 1000000, Milliseconds: 133 RunTest(CompareWithToString, "Compare With ToString", 1000000); //Name: Compare With ToString, Iterations: 1000000, Milliseconds: 112 RunTest(CompareWithToString, "Compare With ToString", 100000000); //Name: Compare With ToString, Iterations: 100000000, Milliseconds: 10116 RunTest(CompareWithParseInt, "Compare With ParseInt", 100000000); //Name: Compare With ParseInt, Iterations: 100000000, Milliseconds: 12447 </code></pre> <p><strong>Conclusion:</strong></p> <p>As you can see in this particular case, you can pretty much do whatever makes you happy because if there is a bottleneck in your application. It's not with the above code :)</p>

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