e6126215e0
Motivation: DefaultHttp2FrameWriter#writeData allocates a DataFrameHeader for each write operation. DataFrameHeader maintains internal state and allocates multiple slices of a buffer which is a maximum of 30 bytes. This 30 byte buffer may not always be necessary and the additional slice operations can utilize retainedSlice to take advantage of pooled objects. We can also save computation and object allocations if there is no padding which is a common case in practice. Modifications: - Remove DataFrameHeader - Add a fast path for padding == 0 Result: Less object allocation in DefaultHttp2FrameWriter
117 lines
3.7 KiB
Java
117 lines
3.7 KiB
Java
/*
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* Copyright 2015 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License,
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* version 2.0 (the "License"); you may not use this file except in compliance
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* with the License. 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, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*/
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/*
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* Copyright 2015 Twitter, Inc.
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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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*/
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package io.netty.handler.codec.http2;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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/**
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* Utility methods for hpack tests.
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*/
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public final class HpackBenchmarkUtil {
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private HpackBenchmarkUtil() {
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}
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/**
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* Internal key used to index a particular set of headers in the map.
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*/
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private static class HeadersKey {
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final HpackHeadersSize size;
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final boolean limitToAscii;
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public HeadersKey(HpackHeadersSize size, boolean limitToAscii) {
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this.size = size;
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this.limitToAscii = limitToAscii;
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}
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List<HpackHeader> newHeaders() {
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return size.newHeaders(limitToAscii);
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}
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@Override
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public boolean equals(Object o) {
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if (this == o) {
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return true;
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}
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if (o == null || getClass() != o.getClass()) {
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return false;
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}
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HeadersKey that = (HeadersKey) o;
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if (limitToAscii != that.limitToAscii) {
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return false;
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}
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return size == that.size;
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}
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@Override
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public int hashCode() {
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int result = size.hashCode();
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result = 31 * result + (limitToAscii ? 1 : 0);
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return result;
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}
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}
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private static final Map<HeadersKey, List<HpackHeader>> headersMap;
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static {
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HpackHeadersSize[] sizes = HpackHeadersSize.values();
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headersMap = new HashMap<HeadersKey, List<HpackHeader>>(sizes.length * 2);
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for (HpackHeadersSize size : sizes) {
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HeadersKey key = new HeadersKey(size, true);
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headersMap.put(key, key.newHeaders());
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key = new HeadersKey(size, false);
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headersMap.put(key, key.newHeaders());
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}
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}
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/**
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* Gets headers for the given size and whether the key/values should be limited to ASCII.
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*/
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static List<HpackHeader> headers(HpackHeadersSize size, boolean limitToAscii) {
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return headersMap.get(new HeadersKey(size, limitToAscii));
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}
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static Http2Headers http2Headers(HpackHeadersSize size, boolean limitToAscii) {
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List<HpackHeader> hpackHeaders = headersMap.get(new HeadersKey(size, limitToAscii));
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Http2Headers http2Headers = new DefaultHttp2Headers(false);
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for (int i = 0; i < hpackHeaders.size(); ++i) {
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HpackHeader hpackHeader = hpackHeaders.get(i);
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http2Headers.add(hpackHeader.name, hpackHeader.value);
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}
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return http2Headers;
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}
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}
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