Join 46,905 users and earn money for participation

BCHN Technical Bulletin 2020-05-04

3 402 boost
Avatar for bitcoincashnode
Written by
This user is who they claim to be.
We have manually verified this user via some other channel.
Proof
  176
8 months ago

Date: May 4, 2020

Author: Calin Culianu <calin.culianu@gmail.com>


GetBlockTemplate Light

In order to provide the most efficient mining RPCs, we have implemented the getblocktemplatelight RPC which is popular amongst various mining pools such as BTC.COM and others.

The two new RPC's are: getblocktemplatelight and submitblocklight. These RPCs reduce the round-trip time for mining software when retrieving new block templates. Transaction data is never sent between mining software and bitcoind. Instead, job_id's are returned and bitcoind later reconstructs the full block based on this job_id and the solved header + coinbase submitted by the miner, leading to more efficient mining.

A full description and specification for this facility can be found here: https://gitlab.com/bitcoin-cash-node/bitcoin-cash-node/-/blob/master/doc/getblocktemplatelight.md

Below are some benchmarks:

Bitcoin Cash Node v0.21.2 (gitlab, Merge Request 281)

getblocktemplatelight, 6000 tx mempool (1271847 bytes)

  • New template generation

    • call time, avg.: 62.025 milliseconds

  • Cached template (returned if you call again within 5 seconds and no new tx's)

    • call time, avg.: 0.917 milliseconds

Bitcoin ABC v0.21.6 (github master) + BTC.COM gbtl patch from https://github.com/btccom/bitcoin-abc-1

getblocktemplatelight, 6000 tx mempool (1271847 bytes)

  • New template generation

    • call time, avg.: 64.200 milliseconds

  • Cached template (returned if you call again within 5 seconds and no new tx's)

    • call time, avg.: 4.909 milliseconds

Winner: BCHN

For the first call to light GBT, ABC and BCHN are comparable. This is because the call is dominated by generating the new template by scanning the mempool. Subsequent calls (which are the common case) show a 4x speed improvement in BCHN over ABC, because BCHN uses better caching.


GetBlockTemplate (regular) Improvements

Bitcoin Cash Node has made some improvements to the regular mining RPC calls. The getblocktemplate call has been made up to 70% faster than the current ABC implementation. We have optimized the JSON RPC code to be much more efficient.

Below are some benchmarks:

Bitcoin Cash Node v0.21.2 (git master)

getblocktemplate, 6000 tx mempool (1271847 bytes)

  • New template generation

    • call time, avg.: 164.023 milliseconds

  • Cached template (returned if you call again within 5 seconds and no new tx's)

    • call time, avg.: 117.277 milliseconds

Bitcoin ABC v0.21.6 (git master)

getblocktemplate, 6000 tx mempool (1271847 bytes)

  • New template generation

    • call time, avg.: 262.200 milliseconds

  • Cached template (returned if you call again within 5 seconds and no new tx's)

    • call time, avg.: 200.476 milliseconds

Winner: BCHN

Between 60% - 70% speed improvement for both calls with BCHN. This is because the verbose getblocktemplate returns a large JSON object. BCHN has heavily optimized the JSON generation code to reduce overhead.


Where to get BCHN + GBT Light

v0.21.2 is coming soon! - This new facility is currently in review but will appear in the upcoming 0.21.2 BCHN release very soon.

You may see the review branch here:

Or you can download a binary pre-release here:


Links:

Sponsors of bitcoincashnode
empty

19
$ 14.23
$ 5.00 from @MarcDeMesel
$ 5.00 from @Keith_Patrick
$ 1.00 from @emergent_reasons
+ 9
Avatar for bitcoincashnode
Written by
This user is who they claim to be.
We have manually verified this user via some other channel.
Proof
  176
8 months ago
Enjoyed this article?  Earn Bitcoin Cash by sharing it! Explain
...and you will also help the author collect more tips.

Comments

Good project indeed! Keep developing the technology to have a robust nodes around BCH. It is a laudable project.

$ 0.00
8 months ago

Nice one and keep it up

$ 0.00
8 months ago

Nice one

$ 0.00
8 months ago