/usr/share/singular/LIB/perf.py is in singular-data 1:4.1.0-p3+ds-2build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 | from Singular import number
n=number(1);
s=number(0)
for i in xrange(1000000):
s=s+n
print s
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