From d03058e410129c653aa717ecb9d1ed88ebde9257 Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Sun, 22 Aug 2021 13:57:29 +0200
Subject: [PATCH] abacus: bignum: add note about div_mod performance

---
 src/bignum/bignum.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/bignum/bignum.cc b/src/bignum/bignum.cc
index ffceaa9..3cfe26b 100644
--- a/src/bignum/bignum.cc
+++ b/src/bignum/bignum.cc
@@ -114,6 +114,7 @@ std::pair<digits_type, digits_type> do_div_mod(digits_type const& lhs,
     digits_type remainder = lhs;
 
     while (!do_less_than(remainder, rhs)) {
+        // TODO: use `do_halve` to back down after calculate highest multiple
         digits_type multiple = rhs;
         digits_type rank;
         rank.push_back(1);