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LibWebView: Create a spare WebContent process

Browse source 
Since cross-site navigation is a pretty frequent task, creating a spare
process is commonplace in other browsers to reduce the overhead of
directing the target site to a new process.

We store this process on the WebView application. If it is unavailable,
we queue a task to create it later.
This commit is contained in:
Timothy Flynn 2025-03-09 18:01:25 -04:00 • committed by Jelle Raaijmakers
commit aca4385daf
Notes: github-actions[bot] 2025-03-11 11:11:42 +00:00
8 changed files with 98 additions and 9 deletions
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46
Libraries/LibWebView/Application.cpp
View file

@ -191,6 +191,52 @@ void Application::initialize(Main::Arguments const& arguments, URL::URL new_tab_
}
}
static ErrorOr<NonnullRefPtr<WebContentClient>> create_web_content_client(Optional<ViewImplementation&> view)
{
auto request_server_socket = TRY(connect_new_request_server_client());
auto image_decoder_socket = TRY(connect_new_image_decoder_client());
if (view.has_value())
return WebView::launch_web_content_process(*view, move(image_decoder_socket), move(request_server_socket));
return WebView::launch_spare_web_content_process(move(image_decoder_socket), move(request_server_socket));
}
ErrorOr<NonnullRefPtr<WebContentClient>> Application::launch_web_content_process(ViewImplementation& view)
{
if (m_spare_web_content_process) {
auto web_content_client = m_spare_web_content_process.release_nonnull();
launch_spare_web_content_process();
web_content_client->assign_view({}, view);
return web_content_client;
}
launch_spare_web_content_process();
return create_web_content_client(view);
}
void Application::launch_spare_web_content_process()
{
if (m_has_queued_task_to_launch_spare_web_content_process)
return;
m_has_queued_task_to_launch_spare_web_content_process = true;
Core::deferred_invoke([this]() {
m_has_queued_task_to_launch_spare_web_content_process = false;
auto web_content_client = create_web_content_client({});
if (web_content_client.is_error()) {
dbgln("Unable to create spare web content client: {}", web_content_client.error());
return;
}
m_spare_web_content_process = web_content_client.release_value();
if (auto process = find_process(m_spare_web_content_process->pid()); process.has_value())
process->set_title("(spare)"_string);
});
}
ErrorOr<void> Application::launch_services()
{
TRY(launch_request_server());