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test: speedup wallet_backup by whitelisting peers (immediate tx relay)

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approaches part of #16613 ("Functional test suite bottlenecks")

The majority of the test time is spent in sync_mempools() after sending to
addresses, i.e. the bottleneck is in relaying transactions. By whitelisting the
peers via -whitelist, the inventory is transmissioned immediately rather than
on average every 5 seconds, speeding up the test by at least a factor of two:

before:
$ time ./wallet_backup.py
real    2m2.523s
user    0m6.093s
sys 0m2.454s

with this PR:
$ time ./wallet_backup_with_whitelist.py
real    0m36.570s
user    0m5.365s
sys 0m1.696s

Note that the test is not deterministic (the sendtoaddress RPC in function
one_send() is executed with a probability of 50%), hence the times could vary
between individual runs.
This commit is contained in:
Sebastian Falbesoner 2019-10-13 02:50:08 +02:00
parent 561a7d3047
commit 581c9be0d8
1 changed files with 7 additions and 1 deletions
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8
test/functional/wallet_backup.py
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@ -48,7 +48,13 @@ class WalletBackupTest(BitcoinTestFramework):
self.num_nodes = 4
self.setup_clean_chain = True
# nodes 1, 2,3 are spenders, let's give them a keypool=100
self.extra_args = [["-keypool=100"], ["-keypool=100"], ["-keypool=100"], []]
# whitelist all peers to speed up tx relay / mempool sync
self.extra_args = [
["-keypool=100", "-whitelist=127.0.0.1"],
["-keypool=100", "-whitelist=127.0.0.1"],
["-keypool=100", "-whitelist=127.0.0.1"],
["-whitelist=127.0.0.1"]
]
self.rpc_timeout = 120
def skip_test_if_missing_module(self):