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-rwxr-xr-x.gitlab/ci.sh7
1 files changed, 7 insertions, 0 deletions
diff --git a/.gitlab/ci.sh b/.gitlab/ci.sh
index 3599aabd82..6500c6923c 100755
--- a/.gitlab/ci.sh
+++ b/.gitlab/ci.sh
@@ -516,6 +516,13 @@ function build_hadrian() {
check_release_build
+ # We can safely enable parallel compression for x64. By the time
+ # hadrian calls tar/xz to produce bindist, there's no other build
+ # work taking place.
+ if [[ "${CI_JOB_NAME:-}" != *"i386"* ]]; then
+ XZ_OPT="${XZ_OPT:-} -T$cores"
+ fi
+
if [[ -n "${REINSTALL_GHC:-}" ]]; then
run_hadrian build-cabal -V
else