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8315098: Improve URLEncodeDecode microbenchmark

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Reviewed-by: ecaspole, dfuchs
This commit is contained in:
Claes Redestad 2023-09-01 11:18:05 +00:00
parent c32e340d94
commit cf02cf31da
1 changed files with 96 additions and 33 deletions
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129
test/micro/org/openjdk/bench/java/net/URLEncodeDecode.java
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@ -37,6 +37,7 @@ import org.openjdk.jmh.infra.Blackhole;
import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import java.nio.charset.StandardCharsets;
import java.util.Random;
import java.util.concurrent.TimeUnit;
@ -51,78 +52,140 @@ import java.util.concurrent.TimeUnit;
@Fork(value = 3)
public class URLEncodeDecode {
@Param("1024")
public int count;
private static final int COUNT = 1024;
@Param("1024")
public int maxLength;
@Param("3")
public long mySeed;
/**
* Percentage of strings that will remain unchanged by an encoding/decoding (0-100)
*/
@Param({"0", "75", "100"})
public int unchanged;
/**
* Percentage of chars in changed strings that cause encoding/decoding to happen (0-100)
*/
@Param({"6"})
public int encodeChars;
public String[] testStringsEncode;
public String[] testStringsDecode;
public String[] toStrings;
@Setup
@Setup()
public void setupStrings() {
char[] tokens = new char[((int) 'Z' - (int) 'A' + 1) + ((int) 'z' - (int) 'a' + 1) + ((int) '9' - (int) '1' + 1) + 5];
char[] encodeTokens = new char[] { '[', '(', ' ', '\u00E4', '\u00E5', '\u00F6', ')', '='};
char[] tokens = new char[('Z' - 'A' + 1) + ('z' - 'a' + 1) + ('9' - '0' + 1) + 4];
int n = 0;
tokens[n++] = '0';
for (int i = (int) '1'; i <= (int) '9'; i++) {
tokens[n++] = (char) i;
for (char c = '0'; c <= '9'; c++) {
tokens[n++] = c;
}
for (int i = (int) 'A'; i <= (int) 'Z'; i++) {
tokens[n++] = (char) i;
for (char c = 'A'; c <= 'Z'; c++) {
tokens[n++] = c;
}
for (int i = (int) 'a'; i <= (int) '<'; i++) {
tokens[n++] = (char) i;
for (char c = 'a'; c <= 'z'; c++) {
tokens[n++] = c;
}
tokens[n++] = '-';
tokens[n++] = '_';
tokens[n++] = '.';
tokens[n++] = '*';
tokens[n] = '*';
Random r = new Random(mySeed);
testStringsEncode = new String[count];
testStringsDecode = new String[count];
toStrings = new String[count];
for (int i = 0; i < count; i++) {
Random r = new Random(3);
testStringsEncode = new String[COUNT];
testStringsDecode = new String[COUNT];
toStrings = new String[COUNT];
for (int i = 0; i < COUNT; i++) {
int l = r.nextInt(maxLength);
boolean needEncoding = r.nextInt(100) >= unchanged;
StringBuilder sb = new StringBuilder();
boolean hasEncoded = false;
for (int j = 0; j < l; j++) {
int c = r.nextInt(tokens.length);
sb.append(tokens[c]);
if (needEncoding && r.nextInt(100) < encodeChars) {
addToken(encodeTokens, r, sb);
hasEncoded = true;
} else {
addToken(tokens, r, sb);
}
}
if (needEncoding && !hasEncoded) {
addToken(encodeTokens, r, sb);
}
testStringsEncode[i] = sb.toString();
}
for (int i = 0; i < count; i++) {
int l = r.nextInt(maxLength);
StringBuilder sb = new StringBuilder();
for (int j = 0; j < l; j++) {
int c = r.nextInt(tokens.length + 5);
if (c >= tokens.length) {
sb.append("%").append(tokens[r.nextInt(16)]).append(tokens[r.nextInt(16)]);
} else {
sb.append(tokens[c]);
int countUnchanged = 0;
for (String s : testStringsEncode) {
if (s.equals(java.net.URLEncoder.encode(s, StandardCharsets.UTF_8))) {
countUnchanged++;
} else {
if (unchanged == 100) {
System.out.println("Unexpectedly needs encoding action: ");
System.out.println("\t" + s);
System.out.println("\t" + java.net.URLEncoder.encode(s, StandardCharsets.UTF_8));
}
}
}
System.out.println();
System.out.println("Generated " + testStringsEncode.length + " encodable strings, " + countUnchanged + " of which does not need encoding action");
for (int i = 0; i < COUNT; i++) {
int l = r.nextInt(maxLength);
boolean needDecoding = r.nextInt(100) >= unchanged;
StringBuilder sb = new StringBuilder();
boolean hasDecoded = false;
for (int j = 0; j < l; j++) {
if (needDecoding && r.nextInt(100) < encodeChars) {
addDecodableChar(tokens, r, sb);
hasDecoded = true;
} else {
addToken(tokens, r, sb);
}
}
if (needDecoding && !hasDecoded) {
addDecodableChar(tokens, r, sb);
}
testStringsDecode[i] = sb.toString();
}
countUnchanged = 0;
for (String s : testStringsDecode) {
if (s.equals(java.net.URLDecoder.decode(s, StandardCharsets.UTF_8))) {
countUnchanged++;
} else {
if (unchanged == 100) {
System.out.println("Unexpectedly needs encoding action: ");
System.out.println("\t" + s);
System.out.println("\t" + java.net.URLDecoder.decode(s, StandardCharsets.UTF_8));
}
}
}
System.out.println("Generated " + testStringsDecode.length + " decodable strings, " + countUnchanged + " of which does not need decoding action");
}
private static void addToken(char[] tokens, Random r, StringBuilder sb) {
int c = r.nextInt(tokens.length);
sb.append(tokens[c]);
}
private static void addDecodableChar(char[] tokens, Random r, StringBuilder sb) {
if (r.nextInt(100) < 15) {
sb.append('+'); // exercise '+' -> ' ' decoding paths.
} else {
sb.append("%").append(tokens[r.nextInt(16)]).append(tokens[r.nextInt(16)]);
}
}
@Benchmark
public void testEncodeUTF8(Blackhole bh) throws UnsupportedEncodingException {
for (String s : testStringsEncode) {
bh.consume(java.net.URLEncoder.encode(s, "UTF-8"));
bh.consume(java.net.URLEncoder.encode(s, StandardCharsets.UTF_8));
}
}
@Benchmark
public void testDecodeUTF8(Blackhole bh) throws UnsupportedEncodingException {
for (String s : testStringsDecode) {
bh.consume(URLDecoder.decode(s, "UTF-8"));
bh.consume(URLDecoder.decode(s, StandardCharsets.UTF_8));
}
}