diff --git a/build/config/compiler/BUILD.gn b/build/config/compiler/BUILD.gn
index a064291c87d..a4614c2a23d 100644
--- a/build/config/compiler/BUILD.gn
+++ b/build/config/compiler/BUILD.gn
@@ -698,7 +698,10 @@ if (is_win) {
     ]
   }
   common_optimize_on_ldflags = [
+    # Linker GC.
     "/OPT:REF",
+    # Identical code folding to reduce size.
+    # Warning: This changes C/C++ semantics of function pointer comparison.
     "/OPT:ICF",
   ]
 } else {
@@ -729,7 +732,7 @@ if (is_win) {
     common_optimize_on_ldflags += [
       # Specifically tell the linker to perform optimizations.
       # See http://lwn.net/Articles/192624/ .
-      "-Wl,-O1",
+      "-Wl,-O2",
       "-Wl,--gc-sections",
     ]