You use about 2 SIMD instructions to compare 16 or 32 or 64 characters to whitespace, commas, and closing brackets, and one of these will be the character after

You use about 2 SIMD instructions to compare 16 or 32 or 64 characters to whitespace, commas, and closing brackets, and one of these will be the character after the end of the integer literal. Theres no dependency between decoding the integer and tokenizing or decoding the next thing.