From 7fb79105fe0cd7b537b12ab6bb454afbf6c52ae2 Mon Sep 17 00:00:00 2001
From: Dimitry Andric <dimitry@andric.com>
Date: Wed, 15 Apr 2020 20:30:15 +0200
Subject: [PATCH] Use maximum compression when packaging release tarballs.

Summary:
Since a full run of test-release.sh takes many hours (at least on my
poor systems), we might as well spend some extra time compressing the
tarball, in return for a quite a bit of gains for uploading and
downloading it.

As an example, the 10.0.0-rc4 .tar.xz tarball shrinks from 465MiB to
306MiB, about 52% smaller.

Reviewers: hans, tstellar, rovka

Reviewed By: hans

Subscribers: llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D76192
---
 llvm/utils/release/test-release.sh | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/llvm/utils/release/test-release.sh b/llvm/utils/release/test-release.sh
index 6b3e6b5453ea..5a8e5c244ecf 100755
--- a/llvm/utils/release/test-release.sh
+++ b/llvm/utils/release/test-release.sh
@@ -470,9 +470,9 @@ function package_release() {
     cd $BuildDir/Phase3/Release
     mv llvmCore-$Release-$RC.install/usr/local $Package
     if [ "$use_gzip" = "yes" ]; then
-      tar cfz $BuildDir/$Package.tar.gz $Package
+      tar cf - $Package | gzip -9c > $BuildDir/$Package.tar.gz
     else
-      tar cfJ $BuildDir/$Package.tar.xz $Package
+      tar cf - $Package | xz -9ce > $BuildDir/$Package.tar.xz
     fi
     mv $Package llvmCore-$Release-$RC.install/usr/local
     cd $cwd