Will I be able to run my site on PHP 7.0? I've started reading about some performance benchmarks with PHP 7.0 which suggest that it is spectacularly much faster. I've searched all over for information on Drupal support for PHP 7.0, but all that I can find concerns Drupal 8 whereas I am still working for the moment on Drupal 7.

I have found this article that concerns Drupal on Windows, which suggests that D7 on PHP7 works, however since I am running on Centos or Ubuntu I would welcome any information anyone might have on this.

My concern is particularly strong because I am just getting started on a project with massive data inputs, which will thus be very performance sensitive.
The canonical Drupal 8 issue is tagged "Needs backport to D7", which indicates the community intends to support Drupal 7 on PHP 7 but it may take a little time.