"Go" writing high-quality Code 157 recommendations for improving C # programs--recommendation 64: Adding Tester-doer mode to loops instead of placing try-catch inside loops

Recommendation 64: Increase the tester-doer mode for loops instead of placing the try-catch inside the loop

If you need to throw an exception in a loop, you need to be particularly careful that throwing an exception is a fairly performance-impacting process. You should try to judge some of the conditions of the anomaly in the loop and then process it according to the conditions.

Do a test:

Stopwatch Watch =stopwatch.startnew (); intx =0;  for(inti =0; I <10000; i++)            {                Try                {                    intj = I/x; }                Catch{}} Console.WriteLine (watch.            Elapsedmilliseconds); Watch=stopwatch.startnew ();  for(inti =0; I <10000; i++)            {                if(x = =0)                {                    Continue; }                intj = I/x; } Console.WriteLine (watch.            Elapsedmilliseconds); Console.readkey ();

The output is:

796

0

In the above code, we foresee that the code will be able to occur dividebyzeroexception anomalies, and then, the adjustment strategy, the conditions of the exception occurred special treatment: Continue let the efficiency has been greatly improved.

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"Go" writing high-quality Code 157 recommendations for improving C # programs--recommendation 64: Adding Tester-doer mode to loops instead of placing try-catch inside loops