stillwater-sc / universal / 27893212284

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Commit Message

perf(elreal): online e_zbcl (~195x) + drop euler_gamma peak pass (#1061 Phase 3b) (#1087)

The last two eager constants in the elreal math layer (#1061 Phase 3b).

e_zbcl: e = sum 1/n! converted to the streaming form -- a lazy term co-list
(term_n = term_{n-1}/n via exact integer div, each term significance-windowed)
folded by infsum (detail::e_term_stream). 16165 ms -> 83 ms at depth 16 (~195x),
value-identical to the 320-digit reference.

euler_gamma_zbcl (Brent-McMillan B1, no clean Taylor form): removed the redundant
Pass-1 peak-finding recurrence using the analytic Stirling peak
(2n*log2(e) - log2(2*pi*n)); value-identical to 320 digits. The per-term recurrence
still dominates (binary-splitting would be a separate effort).

api/math.cpp re-enables the elreal_e() check now that e is fast. Full elreal ctest
42/42 gcc + clang; constants + high-precision (320-digit) + transcendental suites
green; full CI green.

Relates to #1061

Coverage Stats

15 of 15 new or added lines in 1 file covered. (100.0%)

2 existing lines in 1 file now uncovered.

48061 of 56785 relevant lines covered (84.64%)

6779069.98 hits per line