Add b3 format benchmark tests (open-telemetry#1489)

NathanielRN · alrex · web-flow · commit 4083cac3c0ec · 2021-01-21T09:47:30.000-08:00
Co-authored-by: alrex &lt;aboten@lightstep.com&gt;
diff --git a/propagator/opentelemetry-propagator-b3/tests/performance/benchmarks/trace/propagation/test_benchmark_b3_format.py b/propagator/opentelemetry-propagator-b3/tests/performance/benchmarks/trace/propagation/test_benchmark_b3_format.py
@@ -0,0 +1,45 @@
+# Copyright The OpenTelemetry Authors
+#
+# 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.
+
+import opentelemetry.propagators.b3 as b3_format
+import opentelemetry.sdk.trace as trace
+from opentelemetry.trace.propagation.textmap import DictGetter
+
+FORMAT = b3_format.B3Format()
+
+
+def test_extract_single_header(benchmark):
+    benchmark(
+        FORMAT.extract,
+        DictGetter(),
+        {
+            FORMAT.SINGLE_HEADER_KEY: "bdb5b63237ed38aea578af665aa5aa60-c32d953d73ad2251-1-11fd79a30b0896cd285b396ae102dd76"
+        },
+    )
+
+
+def test_inject_empty_context(benchmark):
+    tracer = trace.TracerProvider().get_tracer("sdk_tracer_provider")
+    with tracer.start_as_current_span("Root Span"):
+        with tracer.start_as_current_span("Child Span"):
+            benchmark(
+                FORMAT.inject,
+                dict.__setitem__,
+                {
+                    FORMAT.TRACE_ID_KEY: "bdb5b63237ed38aea578af665aa5aa60",
+                    FORMAT.SPAN_ID_KEY: "00000000000000000c32d953d73ad225",
+                    FORMAT.PARENT_SPAN_ID_KEY: "11fd79a30b0896cd285b396ae102dd76",
+                    FORMAT.SAMPLED_KEY: "1",
+                },
+            )
