| commit | 1d992f2e369e7e518ff57cd7508a15442d5df186 | [log] [tgz] |
|---|---|---|
| author | Juraj Sukop <sukop@users.noreply.github.com> | Wed Feb 27 17:43:46 2019 +0000 |
| committer | Brad Fitzpatrick <bradfitz@golang.org> | Wed Feb 27 18:48:56 2019 +0000 |
| tree | e1e3457d4f71a896c373fca7504cf3cbf3e13a6e | |
| parent | 9650726e79e20386b59b253e98dcaaa768e06c95 [diff] |
math/big: better initial guess for nat.sqrt The proposed change introduces a better initial guess which is closer to the final value and therefore converges in fewer steps. Consider for example sqrt(8): previously the guess was 8, whereas now it is 4 (and the result is 2). All this change does is it computes the division by two more accurately while it keeps the guess ≥ √x. Change-Id: I917248d734a7b0488d14a647a063f674e56c4e30 GitHub-Last-Rev: c06d9d4876c8e7d6739f0e4b687e370fe1e9aad7 GitHub-Pull-Request: golang/go#28981 Reviewed-on: https://go-review.googlesource.com/c/163866 Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Robert Griesemer <gri@golang.org>
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