perf: ignore uuid and timestamp generation for NoopContext (#361)

.github/PULL_REQUEST_TEMPLATE

@@ -13,7 +13,7 @@
 
 <!-- ==== 📈 Remove this line WHEN AND ONLY WHEN you're improving the performance, follow the checklist 👇 ====
 ### Improve the performance of <class or module or ...>
-- [ ] Add a benchmark for the improvement, refer to [the existing ones](https://github.com/apache/skywalking/blob/master/apm-commons/apm-datacarrier/src/test/java/org/apache/skywalking/apm/commons/datacarrier/LinkedArrayBenchmark.java)
+- [ ] Add a benchmark for the improvement, refer to [the existing ones](https://github.com/apache/skywalking/blob/master/oap-server/microbench/src/main/java/org/apache/skywalking/oap/server/microbench/library/datacarrier/LinkedArrayBenchmark.java)
 - [ ] The benchmark result.
 ```text
 <Paste the benchmark results here>

pyproject.toml

@@ -100,6 +100,7 @@ gunicorn = "*"
 uvicorn = "*"
 kafka-python = "*"
 requests = "*"
+pytest-benchmark = "4.0.0"
 
 [tool.poetry.group.plugins.dependencies]
 urllib3 = "1.26.7"

skywalking/trace/__init__.py

@@ -15,6 +15,7 @@
 # limitations under the License.
 #
 
+from typing import Optional
 import uuid
 
 from skywalking.utils.counter import AtomicCounter
@@ -23,7 +24,7 @@
 
 
 class ID(object):
-    def __init__(self, raw_id: str = None):
+    def __init__(self, raw_id: Optional[str] = None):
         self.value = raw_id or str(uuid.uuid1()).replace('-', '')
 
     def __str__(self):

skywalking/trace/context.py

@@ -23,7 +23,7 @@
 from skywalking import sampling
 from skywalking.trace import ID
 from skywalking.trace.carrier import Carrier
-from skywalking.trace.segment import Segment, SegmentRef
+from skywalking.trace.segment import NoopSegment, Segment, SegmentRef
 from skywalking.trace.snapshot import Snapshot
 from skywalking.trace.span import Span, Kind, NoopSpan, EntrySpan, ExitSpan
 from skywalking.utils.counter import Counter
@@ -95,7 +95,7 @@ def get_name(self):
 
 class SpanContext:
     def __init__(self):
-        self.segment: Segment = Segment()
+        self.segment = Segment()
         self._sid: Counter = Counter()
         self._correlation: dict = {}
         self._nspans: int = 0
@@ -285,7 +285,13 @@ def continued(self, snapshot: 'Snapshot'):
 
 class NoopContext(SpanContext):
     def __init__(self):
-        super().__init__()
+        self.segment = NoopSegment()
+        self._sid: Counter = Counter()
+        self._correlation: dict = {}
+        self._nspans: int = 0
+        self.profile_status: Optional[ProfileStatusReference] = None
+        self.create_time = 0
+        self.primary_endpoint: Optional[PrimaryEndpoint] = None
 
     def new_local_span(self, op: str) -> Span:
         return NoopSpan(self)

skywalking/trace/segment.py

@@ -68,6 +68,12 @@ class _NewID(ID):
     pass
 
 
+class _NewNoopID(ID):
+
+    def __init__(self):
+        self.value = ''
+
+
 @tostring
 class Segment(object):
     def __init__(self):
@@ -83,3 +89,11 @@ def relate(self, trace_id: ID):
         if isinstance(self.related_traces[0], _NewID):
             del self.related_traces[-1]
         self.related_traces.append(trace_id)
+
+
+class NoopSegment(Segment):
+    def __init__(self):
+        self.segment_id = _NewNoopID()
+        self.spans = []
+        self.timestamp = 0
+        self.related_traces = [_NewNoopID()]

tests/benchmark/__init__.py

@@ -0,0 +1,16 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You 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.
+#

tests/benchmark/test_span.py

@@ -0,0 +1,36 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You 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.
+#
+
+from typing import Any
+from skywalking.trace.context import NoopContext
+from skywalking.trace.span import NoopSpan
+
+
+def test_noopspan_1000(benchmark: Any):
+    result = benchmark(lambda: [NoopSpan(NoopContext()) for _ in range(1000)])
+    assert result
+
+
+def test_noopspan_40000(benchmark: Any):
+    result = benchmark(lambda: [NoopSpan(NoopContext()) for _ in range(40000)])
+    assert result
+
+
+def test_noopspan_200k(benchmark: Any):
+    result = benchmark(
+        lambda: [NoopSpan(NoopContext()) for _ in range(200000)])
+    assert result