diff --git a/code/__DEFINES/show_message.dm b/code/__DEFINES/messages.dm
similarity index 57%
rename from code/__DEFINES/show_message.dm
rename to code/__DEFINES/messages.dm
index 1b97b9a8ddbe..2f4f3c4631da 100644
--- a/code/__DEFINES/show_message.dm
+++ b/code/__DEFINES/messages.dm
@@ -1,3 +1,10 @@
+#define MAX_MESSAGE_LEN       1024
+#define MAX_PAPER_MESSAGE_LEN 9216
+#define MAX_BOOK_MESSAGE_LEN  27648
+#define MAX_NAME_LEN          26
+#define MAX_LNAME_LEN         64
+#define MAX_REV_REASON_LEN    255
+
 //#define SHOWMSG_SELF
 #define SHOWMSG_VISUAL (1<<0)
 #define SHOWMSG_AUDIO  (1<<1)
diff --git a/code/__DEFINES/subsystem.dm b/code/__DEFINES/subsystem.dm
index 3247fec706af..f2f54da2c92b 100644
--- a/code/__DEFINES/subsystem.dm
+++ b/code/__DEFINES/subsystem.dm
@@ -19,6 +19,7 @@
 // Subsystem init_order, from highest priority to lowest priority
 // The numbers just define the ordering, they are meaningless otherwise.
 
+#define SS_INIT_PROFILER      100
 #define SS_INIT_ASPECTS       86
 #define SS_INIT_INPUT         85
 #define SS_INIT_RATING        14
diff --git a/code/_compile_options.dm b/code/_compile_options.dm
index 206911a83f06..d9a41119aff0 100644
--- a/code/_compile_options.dm
+++ b/code/_compile_options.dm
@@ -2,6 +2,8 @@
 								//Enables in-depth debug messages to runtime log (used for debugging)
 //#define TESTING				//By using the testing("message") proc you can create debug-feedback for people with this
 								//uncommented, but not visible in the release version)
+//#define EARLY_PROFILE  // uncomment to automatically start profiler at the world init, not waiting
+                         // for the subsystems initialization. Allows to collect data for the early init phase
 
 /***** All toggles for the GC ref finder *****/
 
@@ -16,14 +18,6 @@
 #define BACKGROUND_ENABLED 0    // The default value for all uses of set background. Set background can cause gradual lag and is recommended you only turn this on if necessary.
 								// 1 will enable set background. 0 will disable set background.
 
-//Don't set this very much higher then 1024 unless you like inviting people in to dos your server with message spam
-#define MAX_MESSAGE_LEN       1024
-#define MAX_PAPER_MESSAGE_LEN 9216
-#define MAX_BOOK_MESSAGE_LEN  27648
-#define MAX_NAME_LEN          26
-#define MAX_LNAME_LEN         64
-#define MAX_REV_REASON_LEN    255
-
 //Update this whenever you need to take advantage of more recent byond features
 #define MIN_COMPILER_VERSION 514
 #if DM_VERSION < MIN_COMPILER_VERSION
diff --git a/code/controllers/configuration.dm b/code/controllers/configuration.dm
index ef2a53c33f51..f8cd70140f1d 100644
--- a/code/controllers/configuration.dm
+++ b/code/controllers/configuration.dm
@@ -206,6 +206,12 @@ var/global/bridge_secret = null
 	var/load_mine = TRUE
 	var/load_space_levels = TRUE
 
+#ifdef EARLY_PROFILE
+	var/auto_profile = TRUE
+#else
+	var/auto_profile = FALSE
+#endif
+
 	var/auto_lag_switch_pop = FALSE
 
 	var/record_replays = FALSE
@@ -679,6 +685,9 @@ var/global/bridge_secret = null
 				if("no_space_levels")
 					config.load_space_levels = FALSE
 
+				if("auto_profile")
+					config.auto_profile = TRUE
+
 				if("auto_lag_switch_pop")
 					config.auto_lag_switch_pop = text2num(value)
 
diff --git a/code/controllers/subsystem/profiler.dm b/code/controllers/subsystem/profiler.dm
new file mode 100644
index 000000000000..610317a565cb
--- /dev/null
+++ b/code/controllers/subsystem/profiler.dm
@@ -0,0 +1,96 @@
+#define PROFILER_FILENAME "profiler.json"
+#define INIT_PROFILE_NAME "init_profiler.json"
+#define SENDMAPS_FILENAME "sendmaps.json"
+
+SUBSYSTEM_DEF(profiler)
+	name = "Profiler"
+	init_order = SS_INIT_PROFILER
+	runlevels = RUNLEVELS_DEFAULT | RUNLEVEL_LOBBY
+	flags = SS_SHOW_IN_MC_TAB
+	wait = 3000
+	var/fetch_cost = 0
+	var/write_cost = 0
+	var/init_logs_dropped = FALSE
+
+/datum/controller/subsystem/profiler/stat_entry(msg)
+	msg += "F:[round(fetch_cost,1)]ms"
+	msg += "|W:[round(write_cost,1)]ms"
+	return ..()
+
+/datum/controller/subsystem/profiler/Initialize()
+	if(!config.auto_profile)
+		StopProfiling() //Stop the early start profiler
+		return
+
+	StartProfiling()
+
+	return ..()
+
+/datum/controller/subsystem/profiler/fire()
+	if(!init_logs_dropped) // first fire call in lobby after everything is initialized
+		init_logs_dropped = TRUE
+		DumpInitData()
+		return
+
+	DumpData()
+
+/datum/controller/subsystem/profiler/Shutdown()
+	if(config.auto_profile)
+		DumpData(allow_yield = FALSE)
+		world.Profile(PROFILE_CLEAR, type = "sendmaps")
+
+	return ..()
+
+/datum/controller/subsystem/profiler/proc/StartProfiling()
+	info("Byond profiler is enabled.")
+
+	world.Profile(PROFILE_START)
+	world.Profile(PROFILE_START, type = "sendmaps")
+
+	can_fire = TRUE
+
+/datum/controller/subsystem/profiler/proc/StopProfiling()
+	info("Byond profiler is disabled.")
+	world.Profile(PROFILE_STOP)
+	world.Profile(PROFILE_STOP, type = "sendmaps")
+	can_fire = FALSE
+
+/datum/controller/subsystem/profiler/proc/DumpInitData()
+	var/current_profile_data = world.Profile(PROFILE_REFRESH, format = "json")
+	CHECK_TICK
+
+	if(!length(current_profile_data)) //Would be nice to have explicit proc to check this
+		stack_trace("Warning, profiling stopped manually before dump.")
+	var/prof_file = file("[global.log_debug_directory]/[INIT_PROFILE_NAME]")
+	if(fexists(prof_file))
+		fdel(prof_file)
+	WRITE_FILE(prof_file, current_profile_data)
+	world.Profile(PROFILE_CLEAR) //Now that we're written this data out, dump it. We don't want it getting mixed up with our current round data
+
+/datum/controller/subsystem/profiler/proc/DumpData(allow_yield = TRUE)
+	var/timer = TICK_USAGE_REAL
+	var/current_profile_data = world.Profile(PROFILE_REFRESH, format = "json")
+	var/current_sendmaps_data = world.Profile(PROFILE_REFRESH, type = "sendmaps", format="json")
+	fetch_cost = MC_AVERAGE(fetch_cost, TICK_DELTA_TO_MS(TICK_USAGE_REAL - timer))
+	if(allow_yield)
+		CHECK_TICK
+
+	if(!length(current_profile_data)) //Would be nice to have explicit proc to check this
+		stack_trace("Warning, profiling stopped manually before dump.")
+	var/prof_file = file("[global.log_debug_directory]/[PROFILER_FILENAME]")
+	if(fexists(prof_file))
+		fdel(prof_file)
+	if(!length(current_sendmaps_data)) //Would be nice to have explicit proc to check this
+		stack_trace("Warning, sendmaps profiling stopped manually before dump.")
+	var/sendmaps_file = file("[global.log_debug_directory]/[SENDMAPS_FILENAME]")
+	if(fexists(sendmaps_file))
+		fdel(sendmaps_file)
+
+	timer = TICK_USAGE_REAL
+	WRITE_FILE(prof_file, current_profile_data)
+	WRITE_FILE(sendmaps_file, current_sendmaps_data)
+	write_cost = MC_AVERAGE(write_cost, TICK_DELTA_TO_MS(TICK_USAGE_REAL - timer))
+
+#undef PROFILER_FILENAME
+#undef INIT_PROFILE_NAME
+#undef SENDMAPS_FILENAME
diff --git a/code/game/world.dm b/code/game/world.dm
index a346f632c3a1..d97577b01624 100644
--- a/code/game/world.dm
+++ b/code/game/world.dm
@@ -8,6 +8,11 @@ var/global/it_is_a_snow_day = FALSE
 	enable_debugger()
 #endif
 
+#ifdef EARLY_PROFILE
+	Profile(PROFILE_RESTART)
+	Profile(PROFILE_RESTART, type = "sendmaps")
+#endif
+
 	it_is_a_snow_day = prob(50)
 
 	if(byond_version < RECOMMENDED_VERSION)
diff --git a/code/modules/admin/admin_verbs.dm b/code/modules/admin/admin_verbs.dm
index bc036432fc1b..8701053026cd 100644
--- a/code/modules/admin/admin_verbs.dm
+++ b/code/modules/admin/admin_verbs.dm
@@ -166,6 +166,7 @@ var/global/list/admin_verbs_debug = list(
 	/client/proc/generate_round_scoreboard,
 	/client/proc/save_statistics,
 	/client/proc/cmd_admin_list_open_jobs,
+	/client/proc/toggle_profiler,
 	/client/proc/Debug2,
 	/client/proc/forceEvent,
 	/client/proc/ZASSettings,
@@ -295,6 +296,7 @@ var/global/list/admin_verbs_hideable = list(
 	/datum/admins/proc/adjump,
 	/client/proc/cmd_admin_list_open_jobs,
 //	/client/proc/callproc,
+	/client/proc/toggle_profiler,
 	/client/proc/Debug2,
 	/client/proc/reload_admins,
 	/client/proc/cmd_debug_make_powernets,
diff --git a/code/modules/admin/verbs/debug.dm b/code/modules/admin/verbs/debug.dm
index 1a01157cad75..e979e0a1e806 100644
--- a/code/modules/admin/verbs/debug.dm
+++ b/code/modules/admin/verbs/debug.dm
@@ -14,7 +14,25 @@
 
 	feedback_add_details("admin_verb","DG2") //If you are copy-pasting this, ensure the 2nd parameter is unique to the new proc!
 
+/client/proc/toggle_profiler()
+	set category = "Debug"
+	set name = "Toggle Profiler"
+
+	if(!check_rights(R_DEBUG))
+		return
+
+	if(tgui_alert(usr, "Be sure you know what you are doing. You want to [config.auto_profile ? "STOP": "START"] Byond Profiler?",, list("Yes","No")) != "Yes")
+		return
+
+	config.auto_profile = !config.auto_profile
+
+	if(config.auto_profile)
+		SSprofiler.StartProfiling()
+	else
+		SSprofiler.StopProfiling()
 
+	message_admins("[key_name(src)] toggled byond profiler [config.auto_profile ? "on" : "off"].")
+	log_admin("[key_name(src)] toggled byond profiler [config.auto_profile ? "on" : "off"].")
 
 /* 21st Sept 2010
 Updated by Skie -- Still not perfect but better!
diff --git a/config/example/config.txt b/config/example/config.txt
index 9c3d5e85c787..5f0d03ac00b4 100644
--- a/config/example/config.txt
+++ b/config/example/config.txt
@@ -278,13 +278,17 @@ NO_JUNKYARD
 ## Saves some initialization time
 # NO_SPACE_LEVELS
 
+## Uncomment to enable byond profiler. Logs will be dropped in the round log folder.
+## Keep in mind it can cause performance degradation.
+# AUTO_PROFILE
+
 ## Uncomment to allow drastic performence enhancemet measures to turn on automatically once there are equal or more clients than the configured amount (will also prompt admin for veto)
 # AUTO_LAG_SWITCH_POP 100
 
 ## Enables demo recordings, works slower on windows
 # RECORD_REPLAYS
 
-## Use persistent cache for better perfomance
+## Use persistent cache for better performance
 ## You will need to occasionally clean ./cache/persistent yourself from old files
 ## by removing folder or with ./script/clear_persistent_cache.sh
 #USE_PERSISTENT_CACHE
diff --git a/taucetistation.dme b/taucetistation.dme
index 4907bfbba6aa..fa5b91d7c202 100644
--- a/taucetistation.dme
+++ b/taucetistation.dme
@@ -68,6 +68,7 @@
 #include "code\__DEFINES\math_physics.dm"
 #include "code\__DEFINES\mc.dm"
 #include "code\__DEFINES\memories.dm"
+#include "code\__DEFINES\messages.dm"
 #include "code\__DEFINES\misc.dm"
 #include "code\__DEFINES\mob.dm"
 #include "code\__DEFINES\objectives.dm"
@@ -85,7 +86,6 @@
 #include "code\__DEFINES\role_preferences.dm"
 #include "code\__DEFINES\round_aspects.dm"
 #include "code\__DEFINES\say.dm"
-#include "code\__DEFINES\show_message.dm"
 #include "code\__DEFINES\shuttles.dm"
 #include "code\__DEFINES\sight.dm"
 #include "code\__DEFINES\size_classes.dm"
@@ -253,6 +253,7 @@
 #include "code\controllers\subsystem\orbit.dm"
 #include "code\controllers\subsystem\overlays.dm"
 #include "code\controllers\subsystem\parallax.dm"
+#include "code\controllers\subsystem\profiler.dm"
 #include "code\controllers\subsystem\qualities.dm"
 #include "code\controllers\subsystem\quirks.dm"
 #include "code\controllers\subsystem\religion.dm"