A few more process tweaks

- Removes unused btime globals.
- Removes unnecessary multiplication.
- Makes the garbage collector run twice as often, but do half as much
work.
- Makes the garbage collector SCHECK more often when performing hard
deletions.
- Adds a delay to the garbage collector's start.

code/__DEFINES/btime.dm

@@ -2,9 +2,6 @@
 #define PRECISE_TIMER_AVAILABLE
 
 #ifdef PRECISE_TIMER_AVAILABLE
-var/global/__btime__lastTimeOfHour = 0
-var/global/__btime__callCount = 0
-var/global/__btime__lastTick = 0
 var/global/__btime__libName = "btime.[world.system_type==MS_WINDOWS?"dll":"so"]"
 #define TimeOfHour (__extern__timeofhour)
 #define __extern__timeofhour text2num(call(__btime__libName, "gettime")())

code/controllers/ProcessScheduler/core/process.dm

@@ -206,7 +206,7 @@
 		CRASH("Process [name] hung and was restarted.")
 
 	if (main.getCurrentTickElapsedTime() > main.timeAllowance)
-		sleep(world.tick_lag*1)
+		sleep(world.tick_lag)
 		cpu_defer_count++
 		last_slept = TimeOfHour
 	else

code/controllers/Processes/garbage.dm

@@ -1,6 +1,7 @@
 /datum/controller/process/garbage_collector/setup()
 	name = "garbage"
-	schedule_interval = 20 // every 2 seconds
+	schedule_interval = 10
+	start_delay = 3
 
 	garbageCollector = src
 

code/modules/garbage collection/garbage_collector.dm

@@ -2,9 +2,9 @@
 
 // For general information about how the GC works and how to use it, see __gc_info.dm
 
-#define GC_COLLECTIONS_PER_TICK 300 // Was 100.
+#define GC_COLLECTIONS_PER_TICK 150 // Was 100.
 #define GC_COLLECTION_TIMEOUT (30 SECONDS)
-#define GC_FORCE_DEL_PER_TICK 60
+#define GC_FORCE_DEL_PER_TICK 30
 //#define GC_DEBUG
 
 // A list of types that were queued in the GC, and had to be soft deleted; used in testing
@@ -60,6 +60,8 @@ var/global/datum/controller/process/garbage_collector/garbageCollector
 			queue.Cut(1, 2)
 
 			remainingForceDelPerTick--
+			// Sleep check more aggressively when force deleting.
+			calls_since_last_scheck += 9
 		else // Otherwise, it was GC'd - remove it from the queue
 			queue.Cut(1, 2)
 			soft_dels++