async+perf: ch5, polyfills for web workers
Fixed typo: hexidecimal --> hexadecimal
async+perf: ch5, clarifying
async+perf: ch5, more clarification on web workers
async+perf: ch5, more on Parallel JS, SIMD, and Summary
async+perf: ch5, more on SIMD
async+perf: ch5, clarifications