dangernoodle-io / TaipanMiner / 25333059856

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fix(mining): remove fixed diff-1 early-reject on D0 SHA path (#330)

The early-reject filter at 0xFFFF mask is equivalent to pool difficulty ~1.
For lower pool difficulties (e.g. 0.01 on hmpool/digi), this drops 99% of
legitimate shares before the diff-aware meets_target() check. Every nonce
now reaches the caller's target comparison, which is negligible cost since
the SHA peripheral throughput is the bottleneck (~1.20 µs/op), not the
post-reject memcmp.

Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>

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