electrum

Electrum Bitcoin wallet
git clone https://git.parazyd.org/electrum
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commit d86138a1a5a144b5adc32ef8bd1ff7afd860927d
parent 67ae678137fe3bc8b31ce5f925f7ae40962e6132
Author: SomberNight <somber.night@protonmail.com>
Date:   Wed,  6 Jan 2021 21:27:10 +0100

storage: speed up write() by using faster compression setting

Re total runtime of WalletDB.write() and file size on disk,
for a large encrypted wallet, compare:

before (zlib level=6):
file size 16_670 KB
JsonDB.dump 0.5099 sec
zlib.compress 1.3280 sec
ECPubkey.encrypt_message 0.1720 sec

after change (zlib level=1):
file size 17_527 KB
JsonDB.dump 0.5344 sec
zlib.compress 0.5320 sec
ECPubkey.encrypt_message 0.1837 sec

Diffstat:
Melectrum/storage.py | 2+-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/electrum/storage.py b/electrum/storage.py @@ -176,7 +176,7 @@ class WalletStorage(Logger): s = plaintext if self.pubkey: s = bytes(s, 'utf8') - c = zlib.compress(s) + c = zlib.compress(s, level=zlib.Z_BEST_SPEED) enc_magic = self._get_encryption_magic() public_key = ecc.ECPubkey(bfh(self.pubkey)) s = public_key.encrypt_message(c, enc_magic)