Establish new benchmark baseline

The pathological benchmark runs too fast to be meaningful, and because
it only contains a single path, it doesn't make use of multi-threading
like the other test cases do.

So, let's set up a new baseline by adding more paths to the test case
and running it enough times for it to be within the same order of
magnitude as its immediate neighbors.

  Before:
                          user     system      total        real
  pathological        0.000000   0.000000   0.000000 (  0.002413)
  command-t           0.380000   0.000000   0.380000 (  0.380633)
  chromium (subset)   0.850000   0.010000   0.860000 (  0.441269)
  chromium (whole)    3.400000   0.010000   3.410000 (  1.342450)

  After:
                          user     system      total        real
  pathological        0.110000   0.000000   0.110000 (  0.112132)
  command-t           0.340000   0.000000   0.340000 (  0.340255)
  chromium (subset)   0.800000   0.010000   0.810000 (  0.398784)
  chromium (whole)    3.320000   0.010000   3.330000 (  1.236914)

As you can see there is some flutter between runs (the timings for the
other test cases shouldn't have changed), but I am doing best-of-three
runs for all of these, so that's as close as I can get to scientific.

Signed-off-by: Greg Hurrell <greg@hurrell.net>

data/benchmark.yml

@@ -1,9 +1,24 @@
 ---
 tests:
   - name: pathological
-    times: 20
+    times: 200
     paths:
-      - aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+      - aaaaaaaaaaaa
+      - aaaaaaaaaaaaaa
+      - aaaaaaaaaaaaaaaa
+      - aaaaaaaaaaaaaaaaaa
+      - aaaaaaaaaaaaaaaaaaaa
+      - aaaaaaaaaaaaaaaaaaaaaa
+      - aaaaaaaaaaaaaaaaaaaaaaaa
+      - aaaaaaaaaaaaaaaaaaaaaaaaaa
+      - aaaaaaaaaaaaaaaaaaaaaaaaaaaa
+      - aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+      - aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+      - aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+      - aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+      - aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+      - aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+      - aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
     queries:
       - a
       - aaa