tensorflow.js benchmark

WARNING: webgl backend crashes for iOS devices. fix coming soon

Test	Results	Source
		GitHub
		GitHub

Parameters
GPU
OS
BROWSER
TFJS VERSION
BACKEND
WEBGL_VERSION	WEBGL NOT SUPPORTED
WEBGL_FORCE_F16_TEXTURES	WEBGL NOT SUPPORTED
WEBGL_MAX_TEXTURE_SIZE	WEBGL NOT SUPPORTED
WASM_HAS_MULTITHREAD_SUPPORT	WASM NOT SUPPORTED
WASM_HAS_SIMD_SUPPORT	WASM NOT SUPPORTED
WASM THREAD COUNT	WASM NOT SUPPORTED
DEBUG