Compression Run speed training

20/20 correct. Standing PB 3.403s held; session best 4.084s. Visual contiguous-block counting beat/ matched boundary-index variants; no tactic change beat the prior PB. Reuse: ignore nonce/format/instruction/manual, scan tokens once by adjacent blocks, emit count*token groups immediately, no second check. Bottleneck: runtime variance + many-run streams.