2ed3982ffb
99%ile latency of QueryChanges is between 20 seconds and 80 seconds on googlesource.com depending on the time of day. There are two main reasons for that: 1) Performing operations that require loading ChangeNotes 2) Performing operations that require opening the repo 3) Filling accounts with a cold AccountCache This commit parallelizes formatting the individual results to mitigate 1+2. 3 will be addressed by a different change that will make the AccountFiller parallelize, too. Parallelization is done on a newly introduced FanOutExectuor that can be used whenever a serving thread wants to parallelize work. Change-Id: I36c6b92e31488ad001f5aea43efc837d31ba3021
28 lines
971 B
Java
28 lines
971 B
Java
// Copyright (C) 2018 The Android Open Source Project
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package com.google.gerrit.server;
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import static java.lang.annotation.RetentionPolicy.RUNTIME;
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import com.google.inject.BindingAnnotation;
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import java.lang.annotation.Retention;
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/**
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* Marker on the global {@code ThreadPoolExecutor} used to do parallel work from a serving thread.
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*/
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@Retention(RUNTIME)
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@BindingAnnotation
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public @interface FanOutExecutor {}
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