df568c739e
Motivation: 1. Some encoders used a `ByteBuf#writeBytes` to write short constant byte array (2-3 bytes). This can be replaced with more faster `ByteBuf#writeShort` or `ByteBuf#writeMedium` which do not access the memory. 2. Two chained calls of the `ByteBuf#setByte` with constants can be replaced with one `ByteBuf#setShort` to reduce index checks. 3. The signature of method `HttpHeadersEncoder#encoderHeader` has an unnecessary `throws`. Modifications: 1. Use `ByteBuf#writeShort` or `ByteBuf#writeMedium` instead of `ByteBuf#writeBytes` for the constants. 2. Use `ByteBuf#setShort` instead of chained call of the `ByteBuf#setByte` with constants. 3. Remove an unnecessary `throws` from `HttpHeadersEncoder#encoderHeader`. Result: A bit faster writes constants into buffers.
58 lines
2.0 KiB
Java
58 lines
2.0 KiB
Java
/*
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* Copyright 2014 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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package io.netty.handler.codec.http;
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import io.netty.buffer.ByteBuf;
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import io.netty.buffer.ByteBufUtil;
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import io.netty.util.AsciiString;
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import io.netty.util.CharsetUtil;
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import static io.netty.handler.codec.http.HttpConstants.*;
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import static io.netty.handler.codec.http.HttpObjectEncoder.CRLF_SHORT;
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final class HttpHeadersEncoder {
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private static final int COLON_AND_SPACE_SHORT = (COLON << 8) | SP;
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private HttpHeadersEncoder() {
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}
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static void encoderHeader(CharSequence name, CharSequence value, ByteBuf buf) {
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final int nameLen = name.length();
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final int valueLen = value.length();
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final int entryLen = nameLen + valueLen + 4;
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buf.ensureWritable(entryLen);
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int offset = buf.writerIndex();
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writeAscii(buf, offset, name);
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offset += nameLen;
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ByteBufUtil.setShortBE(buf, offset, COLON_AND_SPACE_SHORT);
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offset += 2;
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writeAscii(buf, offset, value);
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offset += valueLen;
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ByteBufUtil.setShortBE(buf, offset, CRLF_SHORT);
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offset += 2;
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buf.writerIndex(offset);
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}
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private static void writeAscii(ByteBuf buf, int offset, CharSequence value) {
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if (value instanceof AsciiString) {
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ByteBufUtil.copy((AsciiString) value, 0, buf, offset, value.length());
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} else {
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buf.setCharSequence(offset, value, CharsetUtil.US_ASCII);
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}
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}
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}
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