diff --git a/byond-extools.dll b/byond-extools.dll
new file mode 100644
index 0000000000..3b3dd39be1
Binary files /dev/null and b/byond-extools.dll differ
diff --git a/cev_eris.dme b/cev_eris.dme
index d531c57519..f32c97f500 100644
--- a/cev_eris.dme
+++ b/cev_eris.dme
@@ -13,6 +13,7 @@
 #include "code\stylesheet.dm"
 #include "code\world.dm"
 #include "code\__DEFINES\_compile_options.dm"
+#include "code\__DEFINES\_extools_api.dm"
 #include "code\__DEFINES\_globals.dm"
 #include "code\__DEFINES\_hydro_setup.dm"
 #include "code\__DEFINES\_planes+layers.dm"
diff --git a/code/__DEFINES/_extools_api.dm b/code/__DEFINES/_extools_api.dm
new file mode 100644
index 0000000000..4e4258e6dd
--- /dev/null
+++ b/code/__DEFINES/_extools_api.dm
@@ -0,0 +1,153 @@
+#define EXTOOLS			(world.system_type == MS_WINDOWS ? "byond-extools.dll" : "./libbyond-extools.so")
+#define EXTOOLS_SUCCESS	"SUCCESS"
+#define EXTOOLS_FAILED	"FAIL"
+#define GLOBAL_PROC		"magic BS"
+
+/*
+	Core - Provides necessary functionality for other modules.
+	Initializing any other modules also initializes this so it shouldn't be necessary to call this.
+*/
+
+/proc/extools_initialize()
+	call(EXTOOLS, "cleanup")()
+	return call(EXTOOLS, "core_initialize")() == EXTOOLS_SUCCESS
+
+/*
+	TFFI - Threaded FFI
+	All DLL calls are automatically threaded off.
+	Black magic is used to suspend (sleep) the currently executing proc, allowing non-blocking FFI.
+	You may call a DLL function and sleep until it returns, pass a callback to be called with the result,
+	or call resolve() on the /datum/promise to receive the return value at any time.
+	Example:
+	var/x = call_wait("sample.dll", "do_work", "arg1", "arg2", "arg3")
+	 - Calls the do_work function from sample.dll with 3 arguments. The proc sleeps until do_work returns.
+	var/datum/promise/P = call_async("sample.dll", "do_work", "arg1")
+	... do something else ...
+	var/result = P.resolve()
+	 - Calls do_work with 1 argument. Returns a promise object. Runs some other code before calling P.resolve() to obtain the result.
+	/proc/print_result(result)
+		world << result
+	call_cb("sample.dll", "do_work", /proc/print_result, "arg1", "arg2")
+	 - Calls do_work with 2 arguments. The callback is invoked with the result as the single argument. Execution resumes immediately.
+*/
+
+/proc/tffi_initialize()
+	return call(EXTOOLS, "tffi_initialize")() == EXTOOLS_SUCCESS
+
+/datum/promise
+	var/completed = FALSE
+	var/result = ""
+	var/callback_context = GLOBAL_PROC
+	var/callback_proc = null
+	var/__id = 0
+
+/datum/promise/New()
+	__id = GLOB.next_promise_id++ //please don't create more than 10^38 promises in a single tick
+
+//This proc's bytecode is overwritten to allow suspending and resuming on demand.
+//None of the code here should run.
+/datum/promise/proc/__internal_resolve(ref, id)
+	if(!GLOB.fallback_alerted && world.system_type != UNIX) // the rewriting is currently broken on Linux.
+		world << "<b>TFFI: __internal_resolve has not been rewritten, the TFFI DLL was not loaded correctly.</b>"
+		world.log << "<b>TFFI: __internal_resolve has not been rewritten, the TFFI DLL was not loaded correctly.</b>"
+		GLOB.fallback_alerted = TRUE
+	while(!completed)
+		sleep(1)
+		//It might be better to just fail and notify the user that something went wrong.
+
+/datum/promise/proc/__resolve_callback()
+	__internal_resolve("\ref[src]", __id)
+	if(callback_context == GLOBAL_PROC)
+		call(callback_proc)(result)
+	else
+		call(callback_context, callback_proc)(result)
+
+/datum/promise/proc/resolve()
+	__internal_resolve("\ref[src]", __id)
+	return result
+
+/proc/call_async()
+	var/list/arguments = args.Copy()
+	var/datum/promise/P = new
+	arguments.Insert(1, "\ref[P]")
+	call(EXTOOLS, "call_async")(arglist(arguments))
+	return P
+
+/proc/call_cb()
+	var/list/arguments = args.Copy()
+	var/context = arguments[3]
+	var/callback = arguments[4]
+	arguments.Cut(3, 5)
+	var/datum/promise/P = new
+	P.callback_context = context
+	P.callback_proc = callback
+	arguments.Insert(1, "\ref[P]")
+	call(EXTOOLS, "call_async")(arglist(arguments))
+	spawn(0)
+		P.__resolve_callback()
+
+/proc/call_wait()
+	return call_async(arglist(args)).resolve()
+
+/*
+	Extended Profiling - High precision in-depth performance profiling.
+	
+	Turning on extended profiling for a proc will cause each execution of it to generate a file in the ./profiles directory
+	containing a breakdown of time spent executing the proc and each sub-proc it calls. Import the file into https://www.speedscope.app/ to
+	view a good visual representation.
+	
+	Be aware that sleeping counts as stopping and restarting the execution of the proc, which will generate multiple files, one between each sleep.
+	
+	For large procs the profiles may become unusably large. Optimizations pending.
+	
+	Example:
+		
+		start_profiling(/datum/explosion/New)
+		
+		- Enables profiling for /datum/explosion/New(), which will produce a detailed breakdown of each explosion that occurs afterwards.
+		
+		stop_profiling(/datum/explosion/New)
+		
+		- Disables profiling for explosions. Any currently running profiles will stop when the proc finishes executing or enters a sleep.
+		
+*/
+
+/proc/profiling_initialize()
+	return call(EXTOOLS, "extended_profiling_initialize")() == EXTOOLS_SUCCESS
+
+/proc/start_profiling(procpath)
+	call(EXTOOLS, "enable_extended_profiling")("[procpath]")
+
+/proc/stop_profiling(procpath)
+	call(EXTOOLS, "disable_extended_profiling")("[procpath]")
+
+/*
+	Debug Server - High and low level debugging of DM code.
+	
+	Calling debugger_initialize will start a debug server that allows connections from frontends,
+	such as SpaceManiac's VSCode extension for line-by-line debugging (and more), or Steamport's
+	Somnium for bytecode inspection.
+	
+	Call with pause = TRUE to wait until the debugger connected and immediately break on the next instruction after the call.
+	
+*/
+
+/proc/debugger_initialize(pause = FALSE)
+	if(world.system_type == MS_WINDOWS)
+		return call(EXTOOLS, "debug_initialize")(pause ? "pause" : "") == EXTOOLS_SUCCESS		
+
+/*
+	Misc
+	
+*/
+
+//Programatically enable and disable the built-in byond profiler. Useful if you want to, for example, profile subsystem initializations.
+/proc/enable_profiling()
+	return call(EXTOOLS, "enable_profiling")() == EXTOOLS_SUCCESS
+
+/proc/disable_profiling()
+	return call(EXTOOLS, "disable_profiling")() == EXTOOLS_SUCCESS
+
+// MAPTICK STUFF //
+/proc/maptick_initialize()
+	return call(EXTOOLS, "maptick_initialize")() == EXTOOLS_SUCCESS
\ No newline at end of file
diff --git a/code/__DEFINES/callbacks.dm b/code/__DEFINES/callbacks.dm
index 753b802a4d..86511832a7 100644
--- a/code/__DEFINES/callbacks.dm
+++ b/code/__DEFINES/callbacks.dm
@@ -1,4 +1,4 @@
-#define GLOBAL_PROC "some_magic_bullshit"
+//#define GLOBAL_PROC "some_magic_bullshit"
 
 #define CALLBACK new /datum/callback
 #define INVOKE_ASYNC ImmediateInvokeAsync
diff --git a/code/__DEFINES/tick.dm b/code/__DEFINES/tick.dm
index c8ff66f41c..28425eb987 100644
--- a/code/__DEFINES/tick.dm
+++ b/code/__DEFINES/tick.dm
@@ -1,4 +1,8 @@
-#define TICK_LIMIT_RUNNING 80
+// Maptick stuff
+#define MAPTICK_MC_MIN_RESERVE 20 //Percentage of tick to leave for master controller to run 
+#define MAPTICK_LAST_INTERNAL_TICK_USAGE ((GLOB.internal_tick_usage / world.tick_lag) * 100) //internal_tick_usage is updated every tick by extools 
+#define TICK_LIMIT_RUNNING (max(90 - MAPTICK_LAST_INTERNAL_TICK_USAGE, MAPTICK_MC_MIN_RESERVE)) 
+
 #define TICK_LIMIT_TO_RUN 78
 #define TICK_LIMIT_MC 70
 #define TICK_LIMIT_MC_INIT_DEFAULT 98
diff --git a/code/_global_vars/misc.dm b/code/_global_vars/misc.dm
index d807e33380..eb361df2ed 100644
--- a/code/_global_vars/misc.dm
+++ b/code/_global_vars/misc.dm
@@ -11,3 +11,13 @@ GLOBAL_DATUM(lobbyScreen, /datum/lobbyscreen)
 // WORLD TOPIC CACHING //
 GLOBAL_VAR(topic_status_lastcache)
 GLOBAL_LIST(topic_status_cache)
+
+// Extools vars
+GLOBAL_VAR_INIT(internal_tick_usage, 0.2 * world.tick_lag) //This var is updated every tick by a DLL if present, used to reduce lag 
+GLOBAL_PROTECT(internal_tick_usage) // NO TOUCHY
+
+GLOBAL_VAR_INIT(fallback_alerted, FALSE)
+GLOBAL_PROTECT(fallback_alerted) // NO TOUCHY
+
+GLOBAL_VAR_INIT(next_promise_id, 0)
+GLOBAL_PROTECT(next_promise_id) // NO TOUCHY
\ No newline at end of file
diff --git a/code/controllers/master.dm b/code/controllers/master.dm
index e0bff9e58c..3064bddf0c 100644
--- a/code/controllers/master.dm
+++ b/code/controllers/master.dm
@@ -571,8 +571,8 @@ GLOBAL_REAL(Master, /datum/controller/master) = new
 	if(!statclick)
 		statclick = new/obj/effect/statclick/debug(null, "Initializing...", src)
 
-	stat("Byond:", "(FPS:[world.fps]) (TickCount:[world.time/world.tick_lag]) (TickDrift:[round(Master.tickdrift,1)]([round((Master.tickdrift/(world.time/world.tick_lag))*100,0.1)]%))")
-	stat("Master Controller:", statclick.update("(TickRate:[Master.processing]) (Iteration:[Master.iteration])"))
+	stat("Byond:", "(FPS:[world.fps]) (TickCount:[world.time/world.tick_lag]) (TickDrift:[round(Master.tickdrift,1)]([round((Master.tickdrift/(world.time/world.tick_lag))*100,0.1)]%)) (Internal Tick Usage: [round(MAPTICK_LAST_INTERNAL_TICK_USAGE,0.1)]%)")
+	stat("Master Controller:", statclick.update("(TickRate:[Master.processing]) (Iteration:[Master.iteration]) (TickLimit: [round(Master.current_ticklimit, 0.1)]%)"))
 
 /datum/controller/master/StartLoadingMap()
 	//disallow more than one map to load at once, multithreading it will just cause race conditions
diff --git a/code/world.dm b/code/world.dm
index c6e3c2fd0e..40c1bd477b 100644
--- a/code/world.dm
+++ b/code/world.dm
@@ -61,13 +61,12 @@ var/game_id = null
 // Only runs if env var EXTOOLS_DLL is set otherwise it won't load the dll file.
 // Used with the Visual Studio Code debugger and DreamMaker Language Client extension from https://github.com/SpaceManiac/SpacemanDMM/wiki/Setting-up-Debugging
 
-/world/proc/enable_debugger()
-    var/dll = world.GetConfig("env", "EXTOOLS_DLL")
-    if (dll)
-        call(dll, "debug_initialize")()
-
 /world/New()
-	enable_debugger()
+	// Begin loading of extools DLL and components
+	extools_initialize()
+	maptick_initialize()
+	debugger_initialize()
+	// End extools
 	//logs
 	var/date_string = time2text(world.realtime, "YYYY/MM-Month/DD-Day")
 	href_logfile = file("data/logs/[date_string] hrefs.htm")
diff --git a/libbyond-extools.so b/libbyond-extools.so
new file mode 100644
index 0000000000..7ae42f20e2
Binary files /dev/null and b/libbyond-extools.so differ