tstorage: speed up write() by using faster compression setting - electrum - Electrum Bitcoin wallet
HTML git clone https://git.parazyd.org/electrum
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---
DIR commit d86138a1a5a144b5adc32ef8bd1ff7afd860927d
DIR parent 67ae678137fe3bc8b31ce5f925f7ae40962e6132
HTML 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:
M electrum/storage.py | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
---
DIR diff --git a/electrum/storage.py b/electrum/storage.py
t@@ -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)