Description: This paper presents an efficient 88 line MATLAB
code for topology optimization. It has been developed using
the 99 line code presented by Sigmund (2001) as a starting
point. The original code has been extended by a density
filter, and a considerable improvement in efficiency has been
achieved, mainly by preallocating arrays and vectorizing
loops. A speed improvement with a factor of 100 is achieved
for a benchmark example with 7500 elements. Moreover,
the length of the code has been reduced to a mere 88 lines.
These improvements have been accomplished without
sacrificing the readability of the code. The 88 line code
can therefore be considered as a valuable successor to the
99 line code, providing a practical instrument that may
help to ease the learning curve for those entering the field
of topology optimization.
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