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<a href="https://gitlab.com/TheRealMichaelCatanzaro">Michael Catanzaro</a> created an issue: <a href="https://gitlab.com/gnutls/gnutls/-/issues/1528">#1528</a>
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<h2 dir="auto" style="font-size: 1.5em; font-weight: 600; padding-bottom: 0.3em; border-bottom-width: 1px; border-bottom-color: #bfbfc3; border-bottom-style: solid; color: #333238; margin: 0 0 16px;" align="initial">
<a id="user-content-description-of-problem" class="anchor" href="#description-of-problem" aria-hidden="true" style="margin-top: 0; float: left; margin-left: -20px; text-decoration: none; outline: none;"></a>Description of problem:</h2>
<p dir="auto" style="color: #333238; margin: 0 0 16px;" align="initial">gnutls_x509_trust_list_add_system_trust() is surprisingly very slow. <a href="https://bugs.webkit.org/show_bug.cgi?id=251336#c19" rel="nofollow noreferrer noopener" target="_blank" style="margin-top: 0;">This is causing a performance problem for WebKitGTK.</a></p>
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<li style="margin-top: 0; line-height: 1.6em; margin-left: 25px; padding-left: 3px;">When running outside flatpak, on my computer the first call takes 100-300 milliseconds and all subsequent calls take 1-3 milliseconds. This isn't great as I didn't realize gnutls_x509_trust_list_add_system_trust() would block for a significant amount of time. But I assume it's probably necessary?</li>
<li style="line-height: 1.6em; margin-left: 25px; padding-left: 3px;">When running under flatpak, on my computer every call takes 100-300 milliseconds. GnuTLS is presumably contacting p11-kit-server every time. This seems like overkill. Would it be possible to cache these results instead so it doesn't happen again and again? Maybe p11-kit-server could notify GnuTLS only when there has been a change?</li>
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<h2 dir="auto" style="font-size: 1.5em; font-weight: 600; padding-bottom: 0.3em; border-bottom-width: 1px; border-bottom-color: #bfbfc3; border-bottom-style: solid; color: #333238; margin: 24px 0 16px;" align="initial">
<a id="user-content-version-of-gnutls-used" class="anchor" href="#version-of-gnutls-used" aria-hidden="true" style="margin-top: 0; float: left; margin-left: -20px; text-decoration: none; outline: none;"></a>Version of gnutls used:</h2>
<p dir="auto" style="color: #333238; margin: 0 0 16px;" align="initial">3.8.0</p>
<h2 dir="auto" style="font-size: 1.5em; font-weight: 600; padding-bottom: 0.3em; border-bottom-width: 1px; border-bottom-color: #bfbfc3; border-bottom-style: solid; color: #333238; margin: 24px 0 16px;" align="initial">
<a id="user-content-distributor-of-gnutls-eg-ubuntu-fedora-rhel" class="anchor" href="#distributor-of-gnutls-eg-ubuntu-fedora-rhel" aria-hidden="true" style="margin-top: 0; float: left; margin-left: -20px; text-decoration: none; outline: none;"></a>Distributor of gnutls (e.g., Ubuntu, Fedora, RHEL)</h2>
<p dir="auto" style="color: #333238; margin: 0 0 16px;" align="initial">Fedora (outside flatpak), freedesktop-sdk (inside flatpak)</p>
<h2 dir="auto" style="font-size: 1.5em; font-weight: 600; padding-bottom: 0.3em; border-bottom-width: 1px; border-bottom-color: #bfbfc3; border-bottom-style: solid; color: #333238; margin: 24px 0 16px;" align="initial">
<a id="user-content-how-reproducible" class="anchor" href="#how-reproducible" aria-hidden="true" style="margin-top: 0; float: left; margin-left: -20px; text-decoration: none; outline: none;"></a>How reproducible:</h2>
<p dir="auto" style="color: #333238; margin: 0 0 16px;" align="initial">Always</p>
<p dir="auto" style="color: #333238; margin: 0 0 16px;" align="initial">Steps to Reproduce:</p>
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<li style="margin-top: 0; line-height: 1.6em; margin-left: 25px; padding-left: 3px;">Build glib-networking using <a href="https://gitlab.gnome.org/GNOME/gnome-build-meta/-/raw/f7d857743fc9ea57899a31e43e4a44d113325b70/patches/glib-networking/extra-debug.patch" rel="nofollow noreferrer noopener" target="_blank" style="margin-top: 0;">this debug patch</a>
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<li style="line-height: 1.6em; margin-left: 25px; padding-left: 3px;">Run <code style='font-size: 90%; color: #1f1e24; word-wrap: break-word; background-color: #ececef; border-radius: 4px; margin-top: 0; font-family: var(--default-mono-font, "GitLab Mono"),"JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; white-space: pre-wrap; overflow-wrap: break-word; word-break: keep-all; padding: 2px 4px;'>G_MESSAGES_DEBUG=GLib-Net epiphany -p https://cnn.com</code>
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<h2 dir="auto" style="font-size: 1.5em; font-weight: 600; padding-bottom: 0.3em; border-bottom-width: 1px; border-bottom-color: #bfbfc3; border-bottom-style: solid; color: #333238; margin: 24px 0 16px;" align="initial">
<a id="user-content-actual-results" class="anchor" href="#actual-results" aria-hidden="true" style="margin-top: 0; float: left; margin-left: -20px; text-decoration: none; outline: none;"></a>Actual results:</h2>
<p dir="auto" style="color: #333238; margin: 0 0 16px;" align="initial">Many slow calls to gnutls_x509_trust_list_add_system_trust()</p>
<h2 dir="auto" style="font-size: 1.5em; font-weight: 600; padding-bottom: 0.3em; border-bottom-width: 1px; border-bottom-color: #bfbfc3; border-bottom-style: solid; color: #333238; margin: 24px 0 16px;" align="initial">
<a id="user-content-expected-results" class="anchor" href="#expected-results" aria-hidden="true" style="margin-top: 0; float: left; margin-left: -20px; text-decoration: none; outline: none;"></a>Expected results:</h2>
<p dir="auto" style="color: #333238; margin: 0;" align="initial">It should be less slow</p>
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