Run signature blocks ahead of time and compact after indexing (#2460)

* Start running all sig blocks ahead of time

* Start compacting GC after finishing indexing

exe/ruby-lsp

@@ -81,6 +81,8 @@ require "ruby_lsp/load_sorbet"
 $LOAD_PATH.unshift(File.expand_path("../lib", __dir__))
 require "ruby_lsp/internal"
 
+T::Utils.run_all_sig_blocks
+
 if options[:debug]
   if ["x64-mingw-ucrt", "x64-mingw32"].include?(RUBY_PLATFORM)
     $stderr.puts "Debugging is not supported on Windows"

lib/ruby_lsp/server.rb

@@ -876,6 +876,11 @@ def perform_initial_indexing
           send_message(Notification.window_show_error("Error while indexing: #{error.message}"))
         end
 
+        # Indexing produces a high number of short lived object allocations. That might lead to some fragmentation and
+        # an unnecessarily expanded heap. Compacting ensures that the heap is as small as possible and that future
+        # allocations and garbage collections are faster
+        GC.compact
+
         # Always end the progress notification even if indexing failed or else it never goes away and the user has no
         # way of dismissing it
         end_progress("indexing-progress")