perf(gateway): re-enable generational GC on hot processes (#2188)

fluxer_gateway/src/guild/guild.erl

@@ -30,7 +30,7 @@ update_counts(State) -> guild_maintenance:update_counts(State).
 -spec init(map()) -> {ok, guild_state(), timeout()}.
 init(GuildState) ->
     process_flag(trap_exit, true),
-    erlang:process_flag(fullsweep_after, 0),
+    erlang:process_flag(fullsweep_after, 10),
     State0 = guild_init:init_base_state(GuildState),
     State1 = guild_init:init_member_list(State0),
     State2 = guild_init:init_counts(State1),
@@ -431,7 +431,7 @@ terminate(Reason, State) ->
 
 -spec code_change(term(), guild_state(), term()) -> {ok, guild_state()}.
 code_change(_OldVsn, State, _Extra) ->
-    erlang:process_flag(fullsweep_after, 0),
+    erlang:process_flag(fullsweep_after, 10),
     erlang:garbage_collect(),
     {ok, State}.
 

fluxer_gateway/src/guild/guild_broadcaster.erl

@@ -71,7 +71,7 @@ maybe_cast(_BroadcasterPid, _Msg) ->
 
 -spec init([integer() | pid()]) -> {ok, map()}.
 init([GuildId, GuildPid]) when is_integer(GuildId), is_pid(GuildPid) ->
-    erlang:process_flag(fullsweep_after, 0),
+    erlang:process_flag(fullsweep_after, 10),
     _ = erlang:monitor(process, GuildPid),
     {ok, #{guild_id => GuildId, guild_pid => GuildPid}}.
 

fluxer_gateway/src/session/session.erl

@@ -80,7 +80,7 @@ start_link(SessionData) ->
 -spec init(map()) -> {ok, session_state()}.
 init(SessionData) ->
     process_flag(trap_exit, true),
-    erlang:process_flag(fullsweep_after, 0),
+    erlang:process_flag(fullsweep_after, 10),
     State0 = session_init:build_state(SessionData),
     ScheduleStartedAt = gateway_timings:start(),
     session_init:schedule_timers(State0),
@@ -318,7 +318,7 @@ terminate(Reason, State) ->
 
 -spec code_change(term(), session_state(), term()) -> {ok, session_state()}.
 code_change(_OldVsn, State, _Extra) ->
-    erlang:process_flag(fullsweep_after, 0),
+    erlang:process_flag(fullsweep_after, 10),
     erlang:garbage_collect(),
     {ok, State}.