LoyceV's 0.1 sat/vbyte Electrum Server Adventure

[Cricktor]

I tested this watch-only wallet with LoyceV's chosen 1000 addresses on my Linux desktop running appimage of Electrum 4.6.2 under Ubuntu 22.04.x connected via LAN to my Fulcrum 2.1 server (Bitcoin Core, Fulcrum and a few other containers run in a Virtualbox VM hosted on Linux Mint running on a Dell Latitude E7470 with 32GB RAM).

The test wallet synced after approx. 18m52s +/- few seconds, where Electrum sat quite some minutes during sync at 13244/20852 kinda frozen and seemingly doing nothing and not counting up on the sync. But then larger count jumps in the sync happened. I have no idea of the logic behind this and what Electrum is doing in those periods of no visual progress. No errors where thrown out (wallet and server).

The wallet synced to 9426 transactions (4 are newer and added compared to LoyceV's post of his results) with a balance of 372.79298051BTC, last transaction was a0219bd9...d26d6045 confirmed 2026-02-14 21:39:35 UTC.

As I don't have any electrs (romanz) or other Electrum server running, I can't make a comparison to something else than Fulcrum on my hardware. But I will try to find a public electrs and see how and if it syncs this wallet. I'll amend results if I have any.

[LoyceV]

Did I manage to explain the idea?

A bit But I wouldn't know how to do this in Electrum, other than manually adding the addresses. But that doesn't give a good overview.

The test wallet synced after approx. 18m52s +/- few seconds

This makes my test even look good

I have no idea of the logic behind this and what Electrum is doing in those periods of no visual progress.

That's what made me think this:

Or maybe Electrum itself gets exponentially more inefficient when loading many addresses?

If anyone wants to test with a larger address sample (I don't dare do this to my Electrum as I'm pretty sure it will run out of memory):

Code:

wget http://addresses.loyce.club/Bitcoin_addresses_LATEST.txt.gz -O- | gunzip | shuf | head -n10000 > 10000_randomaddresses.txt

tmp.loyce.club/10000_randomaddresses.txt