qsieve with time=True doesn't work

[embray]

When running something like qsieve(n, time=True), for some reason it uses the built-in time command in the shell to do this (is there really any advantage in that?)

However, on Cygwin, there is not a time program by default; it is a bash shell built-in, and there is no wrapper executable for it, so trying to run time with Popen fails as reported here: https://ask.sagemath.org/question/48549/qsieve-error/

A workaround would be to just use timeit, like

sage: timeit('qsieve(n)', repeat=1, number=1)

Component: porting: Cygwin

Keywords: qsieve cygwin time

Issue created by migration from https://trac.sagemath.org/ticket/28696

[embray]

comment:1

Ticket retargeted after milestone closed

[mkoeppe]

comment:2

Moving tickets to milestone sage-9.2 based on a review of last modification date, branch status, and severity.

[mkoeppe]

comment:4

Moving to 9.4, as 9.3 has been released.