Patch written by Francisco Couzo.

Patch by Roman Podoliaka.

Issue #28240.

Issue #28240.

Issue #28240.

Issue #28240: timeit: remove -c/--clock and -t/--time command line options
which were deprecated since Python 3.3.

Issue #28240: timeit now repeats the benchmarks 5 times instead of only 3 to
make benchmarks more reliable.

Issue #28240: timeit autorange now uses a single loop iteration if the
benchmark takes less than 10 seconds, instead of 10 iterations.

"python3 -m timeit -s 'import time' 'time.sleep(1)'" now takes 4 seconds
instead of 40 seconds.

Only define fallback implementations when needed. It avoids producing deadcode
when the system provides required math functions.

loss in PyTraceBack_Here().

loss in PyTraceBack_Here().

loss in PyTraceBack_Here().

Reported by Sam Lunt on docs@p.o.

Patch by Mariatta Wijaya.

Patch from Xiang Zhang.

Patch by Xiang Zhang.

Patch written by Julien Palard.

Patch written by Julien Palard.