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-rwxr-xr-xlib/fileset/benchmark.sh4
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/fileset/benchmark.sh b/lib/fileset/benchmark.sh
index b68d2fcefe902..79ab890d6e836 100755
--- a/lib/fileset/benchmark.sh
+++ b/lib/fileset/benchmark.sh
@@ -101,3 +101,7 @@ touch d{0..5}/d{0..5}/d{0..5}/d{0..5}/f{0..5}
 bench 'toSource { root = ./.; fileset = ./.; }'
 
 rm -rf -- *
+
+touch {0..1000}
+bench 'toSource { root = ./.; fileset = unions (mapAttrsToList (name: value: ./. + "/${name}") (builtins.readDir ./.)); }'
+rm -rf -- *