June 2019
Intermediate to advanced
218 pages
5h 19m
English
Content preview from Julia High Performance - Second Edition
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The @fastmath macro
The @fastmath macro is a tool that can be used to loosen the constraints of IEEE floating point operations in order to achieve greater performance. The macro replaces a fixed set of about 50 mathematical operations with faster implementations. In doing so, it can rearrange the order of evaluation to something which is mathematically equivalent, but that would not be the same for discrete floating point numbers due to rounding effects. It can also replace some intrinsic operations with their faster variants that do not check for NaN or Infinity. This results in faster execution, but with a corresponding reduction in accuracy. This option is similar to the -ffast-math option in the Clang or GCC compilers.
For example, consider ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
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