On 19/06/2009, [email protected] <[email protected]> wrote:
> Author: kkolinko
> Date: Fri Jun 19 18:57:59 2009
> New Revision: 786631
>
> URL: http://svn.apache.org/viewvc?rev=786631&view=rev
> Log:
> Add two more implementations for the second test.
> a) using a single ThreadLocal instead of multiple ones
> b) also using StringBuilder instead of StringBuffer
> Also, replaced class.getName() with class.getSimpleName() in the status
> message.
>
> Modified:
> tomcat/trunk/test/org/apache/catalina/valves/Benchmarks.java
>
> Modified: tomcat/trunk/test/org/apache/catalina/valves/Benchmarks.java
> URL:
> http://svn.apache.org/viewvc/tomcat/trunk/test/org/apache/catalina/valves/Benchmarks.java?rev=786631&r1=786630&r2=786631&view=diff
>
> ==============================================================================
> --- tomcat/trunk/test/org/apache/catalina/valves/Benchmarks.java (original)
> +++ tomcat/trunk/test/org/apache/catalina/valves/Benchmarks.java Fri Jun 19
> 18:57:59 2009
> @@ -135,8 +135,8 @@
>
> // note, that we can avoid (long -> Long) conversion
> private static class Struct {
> - long currentMillis = 0;
> - Date currentDate;
> + public long currentMillis = 0;
> + public Date currentDate;
> }
>
> private ThreadLocal<Struct> currentStruct = new
> ThreadLocal<Struct>() {
> @@ -165,7 +165,9 @@
> BenchmarkTest benchmark = new BenchmarkTest();
> Runnable[] tests = new Runnable[] {
> new TimeDateElementBenchmarkTest_Sync(),
> - new TimeDateElementBenchmarkTest_Local() };
> + new TimeDateElementBenchmarkTest_Local(),
> + new TimeDateElementBenchmarkTest_LocalStruct(),
> + new TimeDateElementBenchmarkTest_LocalStruct_SBuilder() };
> benchmark.doTest(5, tests);
> }
>
> @@ -285,13 +287,17 @@
> if (currentDateStringLocal.get() == null) {
> StringBuffer current = new StringBuffer(32);
> current.append('[');
> -
> current.append(dayFormatterLocal.get().format(currentDateLocal.get())); // Day
> + current.append(dayFormatterLocal.get().format(
> + currentDateLocal.get())); // Day
> current.append('/');
> -
> current.append(lookup(monthFormatterLocal.get().format(currentDateLocal.get())));
> // Month
> + current.append(lookup(monthFormatterLocal.get().format(
> + currentDateLocal.get()))); // Month
> current.append('/');
> -
> current.append(yearFormatterLocal.get().format(currentDateLocal.get())); //
> Year
> + current.append(yearFormatterLocal.get().format(
> + currentDateLocal.get())); // Year
> current.append(':');
> -
> current.append(timeFormatterLocal.get().format(currentDateLocal.get())); //
> Time
> + current.append(timeFormatterLocal.get().format(
> + currentDateLocal.get())); // Time
> current.append(']');
> currentDateStringLocal.set(current.toString());
> }
> @@ -308,6 +314,122 @@
> }
> }
>
> + private static class TimeDateElementBenchmarkTest_LocalStruct extends
> + TimeDateElementBenchmarkTestBase implements Runnable {
> +
> + public String toString() {
> + return "single ThreadLocal";
> + }
> +
> + private static class Struct {
> + public String currentDateString;
> + public Date currentDate = new Date();
> + public SimpleDateFormat dayFormatter = new
> SimpleDateFormat("dd");
> + public SimpleDateFormat monthFormatter = new
> SimpleDateFormat("MM");
> + public SimpleDateFormat yearFormatter = new
> SimpleDateFormat("yyyy");
> + public SimpleDateFormat timeFormatter = new SimpleDateFormat(
> + "hh:mm:ss");
> + }
> +
> + private ThreadLocal<Struct> structLocal = new ThreadLocal<Struct>()
> {
> + protected Struct initialValue() {
> + return new Struct();
> + }
> + };
> +
> + public void run() {
> + printDate();
> + }
> +
> + public String printDate() {
> + getDateLocal();
> + Struct struct = structLocal.get();
> + if (struct.currentDateString == null) {
> + StringBuffer current = new StringBuffer(32);
> + current.append('[');
> +
> current.append(struct.dayFormatter.format(struct.currentDate)); // Day
> + current.append('/');
> + current.append(lookup(struct.monthFormatter
> + .format(struct.currentDate))); // Month
> + current.append('/');
> +
> current.append(struct.yearFormatter.format(struct.currentDate)); // Year
> + current.append(':');
> +
> current.append(struct.timeFormatter.format(struct.currentDate)); // Time
> + current.append(']');
> + struct.currentDateString = current.toString();
> + }
> + return struct.currentDateString;
> + }
> +
> + private Date getDateLocal() {
> + Struct struct = structLocal.get();
> + long systime = System.currentTimeMillis();
> + if ((systime - struct.currentDate.getTime()) > 1000) {
> + struct.currentDate.setTime(systime);
> + struct.currentDateString = null;
> + }
> + return struct.currentDate;
> + }
> + }
> +
> + private static class TimeDateElementBenchmarkTest_LocalStruct_SBuilder
> extends
> + TimeDateElementBenchmarkTestBase implements Runnable {
> +
> + public String toString() {
> + return "single ThreadLocal, with StringBuilder";
> + }
> +
> + private static class Struct {
> + public String currentDateString;
> + public Date currentDate = new Date();
> + public SimpleDateFormat dayFormatter = new
> SimpleDateFormat("dd");
> + public SimpleDateFormat monthFormatter = new
> SimpleDateFormat("MM");
> + public SimpleDateFormat yearFormatter = new
> SimpleDateFormat("yyyy");
> + public SimpleDateFormat timeFormatter = new SimpleDateFormat(
> + "hh:mm:ss");
> + }
> +
> + private ThreadLocal<Struct> structLocal = new ThreadLocal<Struct>()
> {
> + protected Struct initialValue() {
> + return new Struct();
> + }
> + };
> +
> + public void run() {
> + printDate();
> + }
> +
> + public String printDate() {
> + getDateLocal();
> + Struct struct = structLocal.get();
> + if (struct.currentDateString == null) {
> + StringBuilder current = new StringBuilder(32);
> + current.append('[');
> +
> current.append(struct.dayFormatter.format(struct.currentDate)); // Day
> + current.append('/');
> + current.append(lookup(struct.monthFormatter
> + .format(struct.currentDate))); // Month
> + current.append('/');
> +
> current.append(struct.yearFormatter.format(struct.currentDate)); // Year
> + current.append(':');
> +
> current.append(struct.timeFormatter.format(struct.currentDate)); // Time
> + current.append(']');
> + struct.currentDateString = current.toString();
> + }
> + return struct.currentDateString;
> + }
> +
> + private Date getDateLocal() {
> + Struct struct = structLocal.get();
> + long systime = System.currentTimeMillis();
> + if ((systime - struct.currentDate.getTime()) > 1000) {
> + struct.currentDate.setTime(systime);
> + struct.currentDateString = null;
> + }
> + return struct.currentDate;
> + }
> + }
> +
> private static class BenchmarkTest {
> public void doTest(int threadCount, Runnable[] tests) throws
> Exception {
> for (int iterations = 1000000; iterations < 10000001; iterations
> += 1000000) {
> @@ -332,9 +454,10 @@
> }
> long end = System.currentTimeMillis();
>
> - System.out.println(test.getClass().getName() + ": " +
> threadCount
> - + " threads and " + iterations + " iterations using "
> - + test + " took " + (end - start) + "ms");
> + System.out.println(test.getClass().getSimpleName() + ": "
> + + threadCount + " threads and " + iterations
> + + " iterations using " + test + " took " + (end - start)
> + + "ms");
IMO it would be easier to compare the figures if the output was
arranged as follows:
System.out.println(threadCount + " threads and " + iterations
+ " took " + (end - start) + " ms"
+ " using "
+ test.getClass().getSimpleName()
+ " : "
+ test
);
especially if the max iterations was set to 9000000 rather than 10000000
> }
> }
>
>
>
>
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