Title: [290993] trunk/Source/_javascript_Core
- Revision
- 290993
- Author
- sbar...@apple.com
- Date
- 2022-03-08 08:42:32 -0800 (Tue, 08 Mar 2022)
Log Message
[JSC] Enable ThinLTO
https://bugs.webkit.org/show_bug.cgi?id=229019
<rdar://problem/82107543>
Reviewed by Mark Lam.
It's a 1% speedup on Speedometer2 across x86 and arm64, and 0.5-1% speedup on
JetStream2 depending on the device.
* Configurations/Base.xcconfig:
Modified Paths
Diff
Modified: trunk/Source/_javascript_Core/ChangeLog (290992 => 290993)
--- trunk/Source/_javascript_Core/ChangeLog 2022-03-08 16:24:11 UTC (rev 290992)
+++ trunk/Source/_javascript_Core/ChangeLog 2022-03-08 16:42:32 UTC (rev 290993)
@@ -1,3 +1,16 @@
+2022-03-08 Saam Barati <sbar...@apple.com>
+
+ [JSC] Enable ThinLTO
+ https://bugs.webkit.org/show_bug.cgi?id=229019
+ <rdar://problem/82107543>
+
+ Reviewed by Mark Lam.
+
+ It's a 1% speedup on Speedometer2 across x86 and arm64, and 0.5-1% speedup on
+ JetStream2 depending on the device.
+
+ * Configurations/Base.xcconfig:
+
2022-03-08 Chris Dumez <cdu...@apple.com>
Unreviewed, reverting r290975.
Modified: trunk/Source/_javascript_Core/Configurations/Base.xcconfig (290992 => 290993)
--- trunk/Source/_javascript_Core/Configurations/Base.xcconfig 2022-03-08 16:24:11 UTC (rev 290992)
+++ trunk/Source/_javascript_Core/Configurations/Base.xcconfig 2022-03-08 16:42:32 UTC (rev 290993)
@@ -190,9 +190,7 @@
WK_WEBKITADDITIONS_INSTALL_PATH = /usr/local/include/WebKitAdditions
WK_WEBKITADDITIONS_HEADERS_FOLDER_PATH = $(SDKROOT)/$(WK_WEBKITADDITIONS_INSTALL_PATH)
-// Disable LTO for _javascript_Core, due to <rdar://problem/24543547>. Add back the following line and delete the one that says "LLVM_LTO = NO" when that issue is resolved.
-// LLVM_LTO = $(WK_LLVM_LTO_$(WK_XCODE_SUPPORTS_LTO));
-LLVM_LTO = NO;
+LLVM_LTO = $(WK_LLVM_LTO_$(WK_XCODE_SUPPORTS_LTO));
WK_LLVM_LTO_NO = NO;
WK_LLVM_LTO_YES = $(WK_USER_LTO_MODE);
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