There are a few problems with sleeping before checking the condition
for the first time:
* It slows down tests.
* The predicate is never checked if the interval duration is greater
than the timeout.
* 0 can't be used to test if the condition is currently true.
There is a minor disadvantage to sleeping before checking: It will
cause more tests to run without an asynchronous interruption, which
could theoretically mask some async bugs.
This is documented to be more performant.
The substitution was made on frontend code, too (i.e., the one in /static),
because Date.now() is supported since IE 9, and we are life supporting only
IE 11.
Commands:
find . -name *.js | xargs sed --in-place "s/new Date().getTime()/Date.now()/g"
find . -name *.js | xargs sed --in-place "s/(new Date()).getTime()/Date.now()/g"
Not done on jQuery.
