Reference is needed to discuss details of the study, but from what you have mentioned I would expect that there was some flaw in the chosen methodology, or some statistical tricks were employed to obtain such a results.
1) I have provided link to thousands of relevant studies in my original comment.
2) There has been an experiment, that has shown that exposure to pulse modulated microwave digital communication signals has caused rapid hearth rate to some "reactive" individuals. It is as clear as that.
3) Just like some people may believe they have cancer, but actually they do not. But we cannot conclude from this that cancer does not exist.
There are literally thousands of studies that link EMF fields as used in today's communication system to health issues, many of them serious, leading to permanent disability or even death.
https://bioinitiative.org/wp-c...
http://showthefineprint.org/si...
For a slight introduction to the topic, watch the lecture of Dr. Barrie Trower:
https://www.youtube.com/watch?...
https://www.youtube.com/watch?...
I also recommend to see the following lecture of Dr. Magda Havas, PhD. who treated successfully severe disabilities with lowering the environmental EMF load on the human body.
https://www.youtube.com/watch?...
Science has already proven that GSM causes cancer to rats. Obviously you cannot do studies like that on humans. The law allows you to deliberately cause cancer to rats but not to humans, for the purpose of a scientific research. Telecommunication industry takes advantage of this, claiming there is no consistent proof that non-ionising EMF causes cancer to humans. They do not actually say "there is no proof", but they say "there is no consistent proof" - implying that some people got cancer, but other did not. And because in some studies people did not get cancer, it is safe, they say. This is perverse logic.
Remember - it took almost 100 years to prove that smoking causes cancer, after the idea was proposed for the first time. Tobacco industry found their ways to suppress the research against them. As a researcher you need funds, and telecommunication industry is happy to fund research stating the EMF is safe. But if you want to prove the opposite in your research, the research funding from telecommunication industry will likely be suspended not just to you, but to the entire university. It is really not easy to get funding for independent research.
JIT warm-up was is taken into account, i.e. test results were discarded until HHVM performance peaked.
Benchmarked PHP scripts are daemons, thus repository authoritative mode would not affect the performance, except of the first request.
The code is object-oriented, consisting of many layers, each split into small testable methods. The benchmarked scripts were basically reading and writing socket streams, transforming data between JSON and MsgPack and reporting its status into Redis database.
Any programming language is at its best before it is implemented and used.
