Comment 9 for bug 1973084

There are many tickets about this memory leak:
https://github.com/transmission/transmission/issues/3055
https://github.com/transmission/transmission/issues/3494
https://github.com/transmission/transmission/issues/3536

The issue has been already fixed, but we have to wait for the next release,
or we can install the nightly builds as recommended by ckerr.
1) install prerequirements:
sudo apt-get update
sudo apt install build-essential cmake libcurl4-openssl-dev libssl-dev curl
2) download latest tarball from https://build.transmissionbt.com/job/trunk-linux/
3) build
tar xf transmission-4.0.0-beta.1.dev+rd381939267.tar.xz
cd transmission-4.0.0-beta.1.dev+rd381939267
mkdir build
cd build
cmake -DCMAKE_BUILD_TYPE=RelWithDebInfo ..
make
sudo make install

The "make" step took an hour on my ten yrs old laptop.
Official description at
https://github.com/transmission/transmission/blob/main/docs/Building-Transmission.md