Updating Sycamore benchmarks

docs/performance.rst

@@ -78,7 +78,7 @@ This performance document is meant to be a simple, to-the-point, and preliminary
 
 100 timed trials of single and parallel gates were run for each qubit count between 4 and 28 qubits. Three tests were performed: the quantum Fourier transform, ("QFT"), random circuits constructed from a universal gate set, and an idealized approximation of Google's Sycamore chip benchmark, as per [Sycamore]_. The benchmarking code is available at `https://github.com/vm6502q/simulator-benchmarks <https://github.com/vm6502q/simulator-benchmarks>`_.
 
-CPU and GPU benchmarks were run on two respective systems that could represent realistic use cases for each engine type. Among AWS virtual machine instances, we sought to find those systems with the lowest possible cost to run the benchmarks for their respective execution times, at or below for the 28 qubit mark. An AWS g3s.xlarge running Ubuntu Server 18.04LTS was selected for GPU benchmarks. An AWS c5.4xlarge running Ubuntu Server 18.04LTS was selected for CPU benchmarks, including FFTW3 for comparison on the QFT test. Benchmarks were collected from December 27, 2019 through January 22, 2020. These results were combined with single gate, N-width gate and Grover's search benchmarks for Qrack, collected overnight from December 19th, 2018 into the morning of December 20th. (The potential difference since December 2018 in these particular Qrack tests reused from then should be insignificant. We took care to try to report fair tests, within cost limitations, but please let us know if you find anything that appears misrepresentative.)
+CPU and GPU benchmarks were run on two respective systems that could represent realistic use cases for each engine type. Among AWS virtual machine instances, we sought to find those systems with the lowest possible cost to run the benchmarks for their respective execution times, at or below for the 28 qubit mark. An AWS g3s.xlarge running Ubuntu Server 18.04LTS was selected for GPU benchmarks. An AWS c5.4xlarge running Ubuntu Server 18.04LTS was selected for CPU benchmarks, including FFTW3 for comparison on the QFT test. Benchmarks were collected from December 27, 2019 through January 24, 2020. These results were combined with single gate, N-width gate and Grover's search benchmarks for Qrack, collected overnight from December 19th, 2018 into the morning of December 20th. (The potential difference since December 2018 in these particular Qrack tests reused from then should be insignificant. We took care to try to report fair tests, within cost limitations, but please let us know if you find anything that appears misrepresentative.)
 
 The average time of each set of 100 was recorded and graphed. Grover's search to invert a black box subroutine, or "oracle," was similarly implemented for trials between 5 and 20 qubits, for QEngineOCL with and without QUnit and QFusion layers. Grover's algorithm was iterated an optimal number of times, vs. qubit count, to maximize probability on a half cycle of the algorithm's period, being :math:`floor\left[\frac{\pi}{4asin^2\left(1/\sqrt{2^N}\right)}\right]` iterations for :math:`N` qubits.