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Merge #13419: [tests] Speed up knapsack_solver_test by not recreating wallet 100 times.

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a679109be4 Speed up knapsack_solver_test by not recreating wallet 100 times. (lucash.dev@gmail.com)

Pull request description:

  Optimization of `knapsack_solver_test`by moving an expensive wallet creation to outside a 100x for loop.

  On my (slow) machine:

  ```
  before:        9.8s
  after:         6.2s
  --------------------
  saved:         3.6s (36%)
  ```

  This PR was split from #13050. Also see #10026.

Tree-SHA512: bde1a856b5f076a5845e14d1a924855c8c91742c3139b47903081289b21d01fef6f2d1fd8947058728a57de56f877bab3866af8cd1d25ba2daa44411752cdb2f
This commit is contained in:
Wladimir J. van der Laan 2018-09-11 09:31:11 +02:00
commit e3fec3cfa8
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GPG Key ID: 1E4AED62986CD25D
1 changed files with 34 additions and 23 deletions
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57
src/wallet/test/coinselector_tests.cpp
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@ -462,14 +462,19 @@ BOOST_AUTO_TEST_CASE(knapsack_solver_test)
BOOST_CHECK(testWallet.SelectCoinsMinConf(MIN_CHANGE * 9990 / 100, filter_confirmed, GroupCoins(vCoins), setCoinsRet, nValueRet, coin_selection_params, bnb_used));
BOOST_CHECK_EQUAL(nValueRet, 101 * MIN_CHANGE);
BOOST_CHECK_EQUAL(setCoinsRet.size(), 2U);
}
// test with many inputs
for (CAmount amt=1500; amt < COIN; amt*=10) {
empty_wallet();
// Create 676 inputs (= (old MAX_STANDARD_TX_SIZE == 100000) / 148 bytes per input)
for (uint16_t j = 0; j < 676; j++)
add_coin(amt);
// test with many inputs
for (CAmount amt=1500; amt < COIN; amt*=10) {
empty_wallet();
// Create 676 inputs (= (old MAX_STANDARD_TX_SIZE == 100000) / 148 bytes per input)
for (uint16_t j = 0; j < 676; j++)
add_coin(amt);
// We only create the wallet once to save time, but we still run the coin selection RUN_TESTS times.
for (int i = 0; i < RUN_TESTS; i++) {
BOOST_CHECK(testWallet.SelectCoinsMinConf(2000, filter_confirmed, GroupCoins(vCoins), setCoinsRet, nValueRet, coin_selection_params, bnb_used));
if (amt - 2000 < MIN_CHANGE) {
// needs more than one input:
uint16_t returnSize = std::ceil((2000.0 + MIN_CHANGE)/amt);
@ -481,14 +486,17 @@ BOOST_AUTO_TEST_CASE(knapsack_solver_test)
BOOST_CHECK_EQUAL(nValueRet, amt);
BOOST_CHECK_EQUAL(setCoinsRet.size(), 1U);
}
}
}
}
// test randomness
{
empty_wallet();
for (int i2 = 0; i2 < 100; i2++)
add_coin(COIN);
// test randomness
{
empty_wallet();
for (int i2 = 0; i2 < 100; i2++)
add_coin(COIN);
// Again, we only create the wallet once to save time, but we still run the coin selection RUN_TESTS times.
for (int i = 0; i < RUN_TESTS; i++) {
// picking 50 from 100 coins doesn't depend on the shuffle,
// but does depend on randomness in the stochastic approximation code
BOOST_CHECK(testWallet.SelectCoinsMinConf(50 * COIN, filter_standard, GroupCoins(vCoins), setCoinsRet , nValueRet, coin_selection_params, bnb_used));
@ -506,17 +514,19 @@ BOOST_AUTO_TEST_CASE(knapsack_solver_test)
fails++;
}
BOOST_CHECK_NE(fails, RANDOM_REPEATS);
}
// add 75 cents in small change. not enough to make 90 cents,
// then try making 90 cents. there are multiple competing "smallest bigger" coins,
// one of which should be picked at random
add_coin(5 * CENT);
add_coin(10 * CENT);
add_coin(15 * CENT);
add_coin(20 * CENT);
add_coin(25 * CENT);
// add 75 cents in small change. not enough to make 90 cents,
// then try making 90 cents. there are multiple competing "smallest bigger" coins,
// one of which should be picked at random
add_coin(5 * CENT);
add_coin(10 * CENT);
add_coin(15 * CENT);
add_coin(20 * CENT);
add_coin(25 * CENT);
fails = 0;
for (int i = 0; i < RUN_TESTS; i++) {
int fails = 0;
for (int j = 0; j < RANDOM_REPEATS; j++)
{
// selecting 1 from 100 identical coins depends on the shuffle; this test will fail 1% of the time
@ -527,8 +537,9 @@ BOOST_AUTO_TEST_CASE(knapsack_solver_test)
fails++;
}
BOOST_CHECK_NE(fails, RANDOM_REPEATS);
}
}
}
}
empty_wallet();
}