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[Benjamin Drung <2114179@xxxxxxxxxxxxxxxxxx>]

** Tags added: dcr-freezer

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https://bugs.launchpad.net/bugs/2114179

Title:
  libgit2 extremely slow performing network operations

Status in libgit2:
  Unknown
Status in libgit2 package in Ubuntu:
  Triaged

Bug description:
  libgit2 in kubuntu 25.04 is extremely slow to complete network
  operations such as git_remote_fetch(), git_clone().

  In kubuntu 25.04 it is taking many minutes (approx. 10) to fetch a
  very small, simple 1MB repository. The exact same code, working on the
  exact same repository, runs in under a second in kubuntu 24.10.

  I can step through the code using gdb and observe that the function
  call that takes an excessive amount of time is git_remote_fetch().

  The code is a very lightly modified version of the original libgit2 example function lg2_fetch():
  ```
  static int lg2_fetch(git_repository *repo) {
  	git_remote *remote = NULL;
  	git_fetch_options fetch_opts = GIT_FETCH_OPTIONS_INIT;
  	const char *remote_name = "origin";

          siril_debug_print("Fetching %s for repo %p\n", remote_name,
  repo);

  	int val;
  	if (git_remote_lookup(&remote, repo, remote_name)) {
  		if (git_remote_create_anonymous(&remote, repo, remote_name)) {
  			siril_log_message(_("Unable to create anonymous remote for the repository. Check your connectivity and try again.\n"));
  			val = 1;
  			goto on_error;
  		}
  	}
  	/* The next line takes a very long time in 25.04 whereas in 24.10 it is quick. */
  	val = git_remote_fetch(remote, NULL, &fetch_opts, "fetch");
  	return val;
  }
  ```

  The same pattern occurs if I delete the local repository and force a
  code path that calls git_clone() to re-clone it from the remote.

  This is not a network speed or conditions problem as I can pull the
  same repository extremely quickly using the main git command-line
  tool.

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