diff -Naur chromium.orig/Makefile chromium/Makefile
--- chromium.orig/Makefile	2021-02-19 00:21:49.000000000 +0200
+++ chromium/Makefile	2021-02-19 00:22:53.000000000 +0200
@@ -127,7 +127,7 @@
 SUB_FILES=	chromium-browser.desktop chrome
 SUB_LIST+=	COMMENT="${COMMENT}"
 
-OPTIONS_DEFINE=	CODECS CUPS DEBUG DRIVER KERBEROS TEST
+OPTIONS_DEFINE=	CODECS CUPS DEBUG DRIVER KERBEROS LTO TEST
 CODECS_DESC=	Compile and enable patented codecs like H.264
 DRIVER_DESC=	Install chromedriver
 OPTIONS_GROUP=		AUDIO
@@ -169,6 +169,10 @@
 KERBEROS_VARS=		GN_ARGS+=use_kerberos=true
 KERBEROS_VARS_OFF=	GN_ARGS+=use_kerberos=false
 
+LTO_VARS=		GN_ARGS+=use_thin_lto=true \
+			GN_ARGS+=thin_lto_enable_optimizations=true \
+			WANTSPACE="lots of free disk space (~ 14GB)"
+			
 PULSEAUDIO_LIB_DEPENDS=	libpulse.so:audio/pulseaudio
 PULSEAUDIO_VARS=	GN_ARGS+=use_pulseaudio=true
 PULSEAUDIO_VARS_OFF=	GN_ARGS+=use_pulseaudio=false