Bittorrent client Transmission 4.0 released with massive improvements

Martin Brinkmann
Feb 9, 2023

Transmission 4.0.0 has been released. The major version release for the open source Bittorrent client improves the program's resource efficiency significantly, and introduces new features and other improvements.

The new Transmission 4.0.0 release is available for download on the official GitHub repository of the project. Existing users may install the new version over the current version; torrent information and settings are retained in the process.

Transmission 4.0: resource efficiency

One of the main improvements of the new Transmission version is that the new release uses less memory and fewer CPU cycles. The developers ran a stress test using a version with 25,000 torrents. This particular client used 50% fewer CPU cycles and 70% less memory than Transmission 3.0.0 during the test.

Mileage varies depending on the program's configuration, operating system and torrents in the client, but most users should notice massive improvements in regards to resource usage of the application.

The application's remote control graphical user interfaces, have been switched to using RPC API "table" mode, which resulted in smaller payloads and less bandwidth use.

Other improvements in Transmission 4.0

The developers have modernized the code of the project by migrating from C to C++ removing "thousands of lines of custom code" in the process. Core code is 18% smaller than before, and the entire codebase is "more testable and maintainable" as a result.

Community contributions to the project have picked up as well. The release notes highlight that the community has submitted over 350 commits and that new contributors have started to work on the project.

Transmission 4.0.0 is the first version of the Bittorrent client that supports Bittorent v2 and hybrid torrents. The current version loads these torrents but there is no support yet for creating these two torrent formats. The developers promise in the release notes that support for creating these torrent formats is planed for an upcoming release.

Transmission is a bit late when it comes to support, as other clients, such as qBittorrent, have added support last year already.

Apart from this, users may now also set a default racker in the application that is used to announce all public torrents.

Transmission 4.0.0 users may now also hide certain information, such as the user-agent, when creating torrents to improve privacy, and set custom piece sizes for torrents. There is also a new IPv6 blocklist available, and a rewritten web client that supports mobile use.

Full release notes are available here.

Closing Words

Transmission 4.0.0 is a big update for the open source Bittorrent client. Improving resource usage and support for Bittorrent v2 and hybrid torrents are probably the two main feature additions of the release.

Now You: do you use Bittorrent clients?

Bittorrent client Transmission 4.0 released with massive improvements
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Bittorrent client Transmission 4.0 released with massive improvements
Transmission 4.0 has been released. The Bittorrent client uses less memory and CPU cycles now, and supports Bittorent v2 and hybrid torrents.
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  1. ilev said on August 4, 2012 at 7:53 pm

    Doesn’t Windows 8 know that www. or http:// are passe ?

    1. Martin Brinkmann said on August 4, 2012 at 7:57 pm

      Well it is a bit difficulty to distinguish between domains and files for instance.

    2. Leonidas Burton said on September 4, 2023 at 4:51 am

      I know a service made by google that is similar to Google bookmarks.

  2. VioletMoon said on August 16, 2023 at 5:26 pm

    @Ashwin–Thankful you delighted my comment; who knows how many “gamers” would have disagreed!

  3. Karl said on August 17, 2023 at 10:36 pm


    The comments section under this very article (3 comments) is identical to the comments section found under the following article:

    Not sure what the issue is, but have seen this issue under some other articles recently but did not report it back then.

  4. Anonymous said on August 25, 2023 at 11:44 am

    Omg a badge!!!
    Some tangible reward lmao.

    It sucks that redditors are going to love the fuck out of it too.

  5. Scroogled said on August 25, 2023 at 10:57 pm

    With the cloud, there is no such thing as unlimited storage or privacy. Stop relying on these tech scums. Purchase your own hardware and develop your own solutions.

    1. lollmaoeven said on August 27, 2023 at 6:24 am

      This is a certified reddit cringe moment. Hilarious how the article’s author tries to dress it up like it’s anything more than a png for doing the reddit corporation’s moderation work for free (or for bribes from companies and political groups)

  6. El Duderino said on August 25, 2023 at 11:14 pm

    Almost al unlmited services have a real limit.

    And this comment is written on the dropbox article from August 25, 2023.

  7. John G. said on August 26, 2023 at 1:29 am

    First comment > @ilev said on August 4, 2012 at 7:53 pm

    For the God’s sake, fix the comments soon please! :[

  8. Kalmly said on August 26, 2023 at 4:42 pm

    Yes. Please. Fix the comments.

  9. Kim Schmidt said on September 3, 2023 at 3:42 pm

    With Google Chrome, it’s only been 1,500 for some time now.

    Anyone who wants to force me in such a way into buying something that I can get elsewhere for free will certainly never see a single dime from my side. I don’t even know how stupid their marketing department is to impose these limits on users instead of offering a valuable product to the paying faction. But they don’t. Even if you pay, you get something that is also available for free elsewhere.

    The algorithm has also become less and less savvy in terms of e.g. English/German translations. It used to be that the bot could sort of sense what you were trying to say and put it into different colloquialisms, which was even fun because it was like, “I know what you’re trying to say here, how about…” Now it’s in parts too stupid to translate the simplest sentences correctly, and the suggestions it makes are at times as moronic as those made by Google Translations.

    If this is a deep-learning AI that learns from users’ translations and the phrases they choose most often – which, by the way, is a valuable, moneys worthwhile contribution of every free user to this project: They invest their time and texts, thereby providing the necessary data for the AI to do the thing as nicely as they brag about it in the first place – alas, the more unprofessional users discovered the translator, the worse the language of this deep-learning bot has become, the greater the aggregate of linguistically illiterate users has become, and the worse the language of this deep-learning bot has become, as it now learns the drivel of every Tom, Dick and Harry out there, which is why I now get their Mickey Mouse language as suggestions: the inane language of people who can barely spell the alphabet, it seems.

    And as a thank you for our time and effort in helping them and their AI learn, they’ve lowered the limit from what was once 5,000 to now 1,500…? A big “fuck off” from here for that! Not a brass farthing from me for this attitude and behaviour, not in a hundred years.

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