Why does an IF statement take longer to run in MATLAB 7.0 (R14) than in previous versions?

27 Jun 2009
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I run code that was developed in MATLAB 6.5 (R13). The performance is slower in MATLAB 7.0 (R14). In particular, one IF statement is significantly slower.

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 Accepted Answer

MathWorks Support Team
MathWorks Support Team on 27 Jun 2009

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There is a bug in MATLAB 7.0 (R14) that affects the way the JIT Accelerator determines when a function has been compiled.
To work around this issue, add code to disable the JIT Accelerator for the portion of the code affected by this issue. For example:
feature('accel', 'off');
% Statement which causes recompilation of code
feature('accel', 'on');

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