cculianu/Fulcrum v1.2.7

Fulcrum 1.2.7

on GitHub

What's new:

This a maintenance release of Fulcrum. It improves performance slightly for servers being hammered by Mist miners. It also contains a few under-the-hood features that will come in handy in the future.

• Optimized JSON parsing to shave more percentage points off CPU consumption when processing client requests (such as the numerous requests coming in from Mist miners).
• Optimized internal asynchronous message-passing in the app to be more performant. This helps to reduce load from Mist miner requests, and it should also be visible on initial synch as a 1%-5% reduction in initial synch time.
• bchd support is ready! It still requires bchd implement persistent connections (#28 ) -- however that's in the works with the bchd team and is in this PR in the bchd repo: gcash/bchd#384. If you want to use Fulcrum with bchd -- you will need to build against that branch.. or wait until the bchd team releases a version with that branch merged. (I have been running bchd from that branch against Fulcrum for days now and it works great!) Update: bchd v0.16.5 now supports persistent connections. Fulcrum and bchd are now 100% compatible with each other!
• Fixed a minor bug where sometimes the getinfo admin RPC command would show a nonsensical value for "avg_fee_sats_B" if the mempool was empty. Now it shows 0, as it should when there are 0 tx's!
• Internal refactoring of code in some subsystems (such as hashing, bloom filtering, BitcoinD communication) to be more maintainable, easier to reason about, and also slightly faster.

Pre-compiled binaries for Linux

I have provided two pre-built binaries for Linux:

• Fulcrum-1.2.7-x86_64-linux.tar.gz, which is compiled on an Ubuntu 18.04 system using Docker.
• Fulcrum-1.2.7-x86_64-linux-ub16.tar.gz, which is compiled on a stock Ubuntu 16.04 system (using Docker) but with g++ 7.3.0 installed from this ppa source: ppa:jonathonf/gcc-7.3 & ppa:jonathonf/gcc

Both of the above binaries contain Qt5Core and Qt5Network from Qt 5.14.2 statically linked. They still requires libz2, libstd++, and the right libc version as dynamic libs on your system (but those are usually present if you are on a recent system).

If the first binary fails, try the second one (-ub16), which should work on older systems, hopefully.

Pre-compiled binaries for Windows

• Fulcrum-1.2.7-win64.zip - Pre-built, statically linked Windows version.
  • It should "just work" on any Windows 7 or above 64-bit system.
  • Includes is a statically-linked Fulcrum.exe, built with Qt 5.14.2 and gcc 7.5.0.
  • Additionally, FulcrumAdmin.exe is included which is the python script, but made into a onefile .exe using PyInstaller.

See the .asc files at the bottom for signatures; my gpg public key can be obtained here: https://github.com/Electron-Cash/keys-n-hashes/blob/master/pubkeys/calinkey.txt

Binary builds for macOS coming soon -- Until then you can always build from source!