New Project Proposal: The Block GC

Remi Forax forax at
Sun Apr 1 09:07:04 UTC 2018

As a coin-artist, i think it's important to support this kind of innovative revolution,
so to improve the velocity of the introduction of the blockchain technology inside the Java ecosystem, i propose to start an ICO (Initial Con-Offering) using Duke Coin as token support.

The white paper describing the exact offering is available at [1].


PS: Early investors can already wire the cash to my personal bitcoin account, to be sure to be part of this fantastic, one in a lifetime, opportunity.


----- Mail original -----
> De: "Magnus Ihse Bursie" <magnus.ihse.bursie at>
> À: "discuss" <discuss at>
> Envoyé: Dimanche 1 Avril 2018 09:35:25
> Objet: New Project Proposal: The Block GC

> I hereby propose the creation of the Block GC Project with myself
> (Magnus Ihse Bursie) as the Lead and the Build Group as the sponsoring
> group.
> In accordance with the OpenJDK guidelines [1], this project will provide
> the Block GC, a creative new approach of handling GC mis-optimization.[2]
> The Block GC, also known as the Block Chain GC, is an innovative new
> system for Garbage Collection. It is a well-known fact that even though
> the JVM can be fine-tuned to employ an optimal GC method for a specific
> payload, most users do not bother to do so, or lack the technical skills
> needed to select the proper GC. The Block GC is a "parasitic" GC, in
> that it does not provide a separate GC system of it own, but instead
> selects the most optimal GC for each individual payload.
> As a unique feature, the Block GC will measure and accurately calculate
> the improvement provided by selecting the optimal GC method, compared to
> the GC previously selected. Let T_gc_def be the time the user
> application is stopped during the GC for the default GC settings, and
> let T_gc_opt be the corresponding time using the optimal GC method
> selected by the Block GC. The difference T_gc_def - T_gc_opt is the
> improvement in pausetime provided by the Block GC, and is known as the
> "block gain".
> The block gain can be seen as a hidden resource, available for free from
> the user of the JRE. After the GC has finished, the JRE can use the time
> provided by the block gain, with the user threads still suspended,
> without the application suffering performance regressions. In the
> initial implementation of the Block GC, the block gain was just used to
> let the JVM sleep for an amount of time corresponding to the block gain.
> This gave us a simple way to save processor cycles, and hence energy,
> thus providing a simple way for the Java user to help fight climate
> change without even noticing it.
> While a noble goal, this does not really makes business sense. In the
> updated version of the Block GC, which we propose to be added as the
> default GC in JDK 11, the block gain is instead used to calculate hash
> values for popular cryptocurrencies, a.k.a. "bitcoin mining". Our
> estimates show that this can generate a significant amount of revenue;
> with a projected ~50 M downloads of JDK 11, running typical workloads,
> and with typical values for GC settings (default or misconfigured),
> $50k/day for all OpenJDK installations worldwide is not unreasonable.
> This is a pure win-win scenario. The user will not notice any
> performance regression compared to the previous GC settings, and the
> cryptocurrency account proprietor will benefit fiscally.
> The user can set their own blockchain account, instead of the default,
> by issuing this command:
>    java -XX:UnlockDangerousOptions
> -XX:UnsupportedGCOption=new_provider_config:<path to config file>
> where <path to config file> points to a configuration file in ASN.1
> format describing the blockchain account. We hope to finish the
> documentation of this file in time for the release, but if not done, it
> will not be considered a release blocker.
> If a user override is not provided as above, by default, the revenue
> extracted by the Block GC miner will be stored in the Block GC Project
> account. This revenue will be divided as follows: 90% will go to the
> initial committers of the Block GC Project, and 10% will go to the
> OpenJDK community.
> The first installment of the 10% payment to the OpenJDK comminuty will
> be issued exactly one year from now, on April 1st 2019.[3]
> A preview of the Block GC can be found here:
> The initial Committers will be: Magnus Ihse Bursie, Satoshi Nakamoto and
> P. T. Barnum.
> /Magnus
> [1]
> [2]
> [3]

More information about the discuss mailing list