--- Revision None
+++ Revision 313932316263
@@ -0,0 +1,48 @@
+#!/bin/bash
+
+mnt=/mnt/sdd
+dev=/dev/sdd
+
+umount $dev &> /dev/null
+mkfs.btrfs -f -n 4096 $dev
+mount $dev $mnt
+
+echo -e "Filling fs...\n"
+
+# Ensure we get the fs tree with 3+ levels.
+xattr_val=$(printf '%0.sX' $(seq 1 3850))
+for ((i = 1; i <= 10000; i++)); do
+        echo -n > $mnt/filler_$i
+        setfattr -n user.x1 -v $xattr_val $mnt/filler_$i
+done
+
+xfs_io -f -c "pwrite 0 128K" $mnt/foobar
+
+# Creating snapshots..."
+for ((i = 1; i <= 1000; i++)); do
+        btrfs subvolume snapshot -r $mnt $mnt/snap_$i
+done
+
+extent_bytenr=$(btrfs inspect-internal dump-tree -t 5 $dev | egrep -A 2 EXTENT_DATA | perl -ne 'print $1 if /disk byte (\d+)/')
+echo -e "\nExtent location at disk bytenr $extent_bytenr\n"
+
+ts_before=$(date +%s)
+btrfs inspect-internal logical-resolve -P $extent_bytenr $mnt | wc -l
+ts_after=$(date +%s)
+echo -e "\nlogical-resolve took $((ts_after - ts_before)) seconds\n"
+
+ts_before=$(date +%s)
+btrfs send -f /dev/null $mnt/snap_1
+ts_after=$(date +%s)
+echo -e "\nsend took $((ts_after - ts_before)) seconds\n"
+
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