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opt: Cut if last addition was minimal weight

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In situations where we have UTXO groups of various weight, we can CUT
rather than SHIFT when we exceeded the max_weight or the best
selection’s weight while the last step was equal to the minimum weight
in the lookahead.
This commit is contained in:
Murch
2024-01-08 14:42:08 -05:00
parent 5248e2a60d
commit 1edd2baa37
2 changed files with 23 additions and 8 deletions
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4
src/wallet/test/coinselector_tests.cpp
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@@ -1231,7 +1231,7 @@ BOOST_AUTO_TEST_CASE(coin_grinder_tests)
add_coin(4 * COIN, 3, expected_result);
BOOST_CHECK(EquivalentResult(expected_result, *res));
// Demonstrate how following improvements reduce iteration count and catch any regressions in the future.
size_t expected_attempts = 281;
size_t expected_attempts = 218;
BOOST_CHECK_MESSAGE(res->GetSelectionsEvaluated() == expected_attempts, strprintf("Expected %i attempts, but got %i", expected_attempts, res->GetSelectionsEvaluated()));
}
@@ -1271,7 +1271,7 @@ BOOST_AUTO_TEST_CASE(coin_grinder_tests)
BOOST_CHECK(EquivalentResult(expected_result, *res));
// Demonstrate how following improvements reduce iteration count and catch any regressions in the future.
// If this takes more attempts, the implementation has regressed
size_t expected_attempts = 43;
size_t expected_attempts = 42;
BOOST_CHECK_MESSAGE(res->GetSelectionsEvaluated() == expected_attempts, strprintf("Expected %i attempts, but got %i", expected_attempts, res->GetSelectionsEvaluated()));
}