perf-test: rename memory tests

The common suffix will help running them all automatically.

diff --git a/performance-test/M00-new b/performance-test/M00-new
deleted file mode 100755 (executable)
index 99c3f52..0000000
--- a/performance-test/M00-new
+++ /dev/null
@@ -1,15 +0,0 @@
-#!/bin/bash
-
-test_description='notmuch new'
-
-. ./perf-test-lib.sh
-
-# ensure initial 'notmuch new' is run by memory_start
-uncache_database
-
-memory_start
-
-# run 'notmuch new' a second time, to test different code paths
-memory_run "notmuch new" "notmuch new"
-
-memory_done

diff --git a/performance-test/M00-new.sh b/performance-test/M00-new.sh
new file mode 100755 (executable)
index 0000000..99c3f52
--- /dev/null
+++ b/performance-test/M00-new.sh
@@ -0,0 +1,15 @@
+#!/bin/bash
+
+test_description='notmuch new'
+
+. ./perf-test-lib.sh
+
+# ensure initial 'notmuch new' is run by memory_start
+uncache_database
+
+memory_start
+
+# run 'notmuch new' a second time, to test different code paths
+memory_run "notmuch new" "notmuch new"
+
+memory_done

diff --git a/performance-test/M01-dump-restore b/performance-test/M01-dump-restore
deleted file mode 100755 (executable)
index be5894a..0000000
--- a/performance-test/M01-dump-restore
+++ /dev/null
@@ -1,15 +0,0 @@
-#!/bin/bash
-
-test_description='dump and restore'
-
-. ./perf-test-lib.sh
-
-memory_start
-
-memory_run 'load nmbug tags' 'notmuch restore --accumulate --input=corpus.tags/nmbug.sup-dump'
-memory_run 'dump *' 'notmuch dump --output=tags.sup'
-memory_run 'restore *' 'notmuch restore --input=tags.sup'
-memory_run 'dump --format=batch-tag *' 'notmuch dump --format=batch-tag --output=tags.bt'
-memory_run 'restore --format=batch-tag *' 'notmuch restore --format=batch-tag --input=tags.bt'
-
-memory_done

diff --git a/performance-test/M01-dump-restore.sh b/performance-test/M01-dump-restore.sh
new file mode 100755 (executable)
index 0000000..be5894a
--- /dev/null
+++ b/performance-test/M01-dump-restore.sh
@@ -0,0 +1,15 @@
+#!/bin/bash
+
+test_description='dump and restore'
+
+. ./perf-test-lib.sh
+
+memory_start
+
+memory_run 'load nmbug tags' 'notmuch restore --accumulate --input=corpus.tags/nmbug.sup-dump'
+memory_run 'dump *' 'notmuch dump --output=tags.sup'
+memory_run 'restore *' 'notmuch restore --input=tags.sup'
+memory_run 'dump --format=batch-tag *' 'notmuch dump --format=batch-tag --output=tags.bt'
+memory_run 'restore --format=batch-tag *' 'notmuch restore --format=batch-tag --input=tags.bt'
+
+memory_done