abseil-cpp VS Transmission

Yeah, it's nice! And Abseil does it, IFF you use LLVM libc++.

https://github.com/abseil/abseil-cpp/blob/master/absl/string...

The standard adopted it as resize_and_overwrite. Which I think is a little clunky.

This may be confusing to those familiar with Google's libraries. The baseline is the Go BTree, which I personally never heard of until just now, not the C++ absl::btree_set. The benchmarks aren't directly comparable, but the C++ version also comes with good microbenchmark coverage.

https://github.com/google/btree

https://github.com/abseil/abseil-cpp/blob/master/absl/contai...

An implementation of call_once that accommodates callbacks that throw: https://github.com/abseil/abseil-cpp/blob/master/absl/base/c...

I wouldn't say it's that cryptic. It's just a few bitwise rotations/shifts/xor operations.

You can see hashing optimizations as well https://www.deepmind.com/blog/alphadev-discovers-faster-sort..., https://github.com/abseil/abseil-cpp/commit/74eee2aff683cc7d...

I was one of the members who reviewed expertly what has been done both in sorting and hashing. Overall it's more about assembly, finding missed compiler optimizations and balancing between correctness and distribution (in hashing in particular).

It was not revolutionary in a sense it hasn't found completely new approaches but converged to something incomprehensible for humans but relatively good for performance which proves the point that optimal programs are very inhuman.

Note that for instructions in sorting, removing them does not always lead to better performance, for example, instructions can run in parallel and the effect can be less profound. Benchmarks can lie and compiler could do something differently when recompiling the sort3 function which was changed. There was some evidence that the effect can come from the other side.

For hashing it was even funnier, very small strings up to 64 bit already used 3 instructions like add some constant -> multiply 64x64 -> xor upper/lower. For bigger ones the question becomes more complicated, that's why 9-16 was a better spot and it simplified from 2 multiplications to just one and a rotation. Distribution on real workloads was good, it almost passed smhasher and we decided it was good enough to try out in prod. We did not rollback as you can see from abseil :)

But even given all that, it was fascinating to watch how this system was searching and was able to find particular programs can be further simplified. Kudos to everyone involved, it's a great incremental change that can bring more results in the future.

Check out https://abseil.io. It offers absl::optional, which is a backport of std::optional.

Why bake libtransmission into the app instead of just using the transmission daemon's RPC?

What you've done actually makes it harder to use, because in order to configure any of transmission's settings (ports, connection/torrent connection limits, bandwith limits, etc) the user needs to dig around to find the transmission config folder and then manually edit JSON with a text editor - because your client doesn't expose any of transmissions numerous settings [1] to the user except for choosing the download folder.

I'm not sure why anyone would want to use this instead of Flood [2] or even old Transmission Web Control [3]

1: https://github.com/transmission/transmission/blob/main/docs/...

1: https://github.com/jesec/flood

2: https://github.com/ronggang/transmission-web-control

Grab this file. Install Transmission on Mac or Deluge on Win. Optional: run a VPN if you're in the US(mostly) and worried about your ISP sending you a cease-and-desist notice. Open the file using the app you installed. Wait. It should start within a minute or two and download progress will be seen. Speed depends on how many people are sharing it. Any issues, let me know.

Why "NO TORRENT"? Just get TransmissionBT and torrent whatever you want

Its intresting you mention that, before reading your reply I went and created a post in the Q n A section, asking for help about this very thing and I linked to the same GitHub issue you linked to here. I have yet to get a reply lol.here

transmission can run as a headless server with a web gui

Get a VPN like Windscribe(set windscribe firewall to on instead of auto), forward your port via their website. Use a good torrent client like https://transmissionbt.com/ set that port in the options, and add a blocklist https://github.com/Naunter/BT\_BlockLists/raw/master/bt\_blocklists.gz