Rewrite the build system benchmarks to be much simpler and not require bazel.

Test: ./benchmarks && ./format_benchmarks
Change-Id: I907421ed0c85e961d78342a3e58b2d4ab4aaf6ac

tools/perf/pretty.py

@@ -0,0 +1,52 @@
+# Copyright (C) 2023 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Formatting utilities
+
+class Sentinel():
+    pass
+
+SEPARATOR = Sentinel()
+
+def FormatTable(data, prefix=""):
+    """Pretty print a table.
+
+    Prefixes each row with `prefix`.
+    """
+    if not data:
+        return ""
+    widths = [max([len(x) if x else 0 for x in col]) for col
+              in zip(*[d for d in data if not isinstance(d, Sentinel)])]
+    result = ""
+    colsep = "  "
+    for row in data:
+        result += prefix
+        if row == SEPARATOR:
+            for w in widths:
+                result += "-" * w
+                result += colsep
+            result += "\n"
+        else:
+            for i in range(len(row)):
+                cell = row[i] if row[i] else ""
+                if i != 0:
+                    result += " " * (widths[i] - len(cell))
+                result += cell
+                if i == 0:
+                    result += " " * (widths[i] - len(cell))
+                result += colsep
+            result += "\n"
+    return result
+
+