1. Some speed benchmarks

filename	OS	CPU	C compiler	Garbage Collector	build command	speed gain, times	packed exe size, KiB	comment
GCBench.exe	Win32	x86	MinGW	BoehmGC	[3626]	1.3	55
CaffeineMarkEmbeddedApp.exe	Win32	x86	MinGW	BoehmGC	[3626]	6 !!!	60	GCC has much higher optimization level than JIT
scimark2.exe	Win32	x86	MinGW	-	[3625]	1.55	60
QSort.exe	Win32	x86	MinGW	-	[3625]	1.2	30	"quick-sort" benchmark

The download link: SpeedTests-win32.7z.

Notes:

• the speed is compared to Sun JRE v1.6;
• the original source code is freely available on the web;
• "CaffeineMarkEmbeddedApp" and "GCBench" sources require minor fixing (see the patch files in the JCGO "examples" folder);
• the above benchmarks have been translated to C using "jcgo <AppMainClass> -src $~/goclsp/clsp_asc @$~/stdpaths.in" command;
• the "build command" (corresponding to the number shown) is in the JCGO "Samples" file;
• the above benchmarks had been first compiled with GCC -fprofile-generate option and, after a test run, have been recompiled with -fprofile-use option (for better optimizations);
• the produced stand-alone executable files have been packed by UPX with "--brute" option.

2. Hello world...

Some trivial console programs from the JCGO "examples" folder ("Empty1" - a do-nothing program just to show code size minimum; "ShowTZ" - shows the current GMT/local time and timezone/locale info).

filename	OS	CPU	C compiler	Garbage Collector	build command	packed exe size, KiB
hello.exe	Win32	x86	MinGW	-	[3613]	13
hello.com	DOS	i8086	Watcom	-	[2906]	15
empty1.com	DOS	i8086	Watcom	-	[2906]	4.6
ShowTZ.exe	Win32	x86	MinGW	-	[3612]	140

The download link: HelloWorld-win32.7z.

Notes:

• "Hello" sample has been translated to C using "jcgo <AppMainClass> -src $~/goclsp/clsp_asc @$~/stdpaths.in" command;
• the produced stand-alone executable files (except for "Empty1" sample) have been packed by UPX;
• "ShowTZ" may require setting "CLASSPATH" environment variable (to "C:\JCGO\classpath-0.93\resource") for accessing non-default locale information.

3. Java System properties

"ShowProp" console sample program shows major Java system properties preset by the JCGO runtime depending on the execution environment.

filename	OS	CPU	C compiler	Garbage Collector	build command	packed exe size, KiB
ShowProp.exe	Win32	x86	MinGW	-	[3618]	43
ShowProp-amd64.exe	Win64	amd64	mingw-w64	-	[3905]	150
ShowProp-djgpp.exe	DOS	x86	DJGPP	-	[4310]	105
ShowProp-dos16.exe	DOS	i8086	Watcom	TinyGC	[2903]	85
ShowProp-linux-x86	Linux	x86	GCC	-	[1009]	50
ShowProp-linux-amd64	Linux	amd64	GCC	-	[1307]	55
ShowProp-freebsd-x86	FreeBSD	x86	GCC	-	[1506]	50
ShowProp-solaris-amd64	Solaris	amd64	Sun CC	-	[1806]	220

The tar-ball download link: ShowProp-bin.tar.gz.

Notes:

• the sample code has been translated to C using "jcgo -src $~/examples ShowProp -src $~/goclsp/clsp_asc @$~/stdpaths.in" command;
• the produced stand-alone executable files have been packed by UPX;
• "ShowProp-djgpp" may require "DOSLFN" utility (if executed on a pure DOS system);
• the JCGO runtime identifies itself by setting "java.vm.name" system property to "JCGO client VM" value.

4. Some third-party console single-threaded tools

"ProGuard" and "JavaCC" are two samples of mature console applications.

application download filename	OS	CPU	C compiler	Garbage Collector	build command	exe size (unpacked), KiB	application download size, MiB	comment
proguard.exe	Win32	x86	MinGW	BoehmGC	[3620]	1194	0.33	stand-alone console executable (ProGuard v4.5 beta2 Java class file optimizer and obfuscator); see source code
JavaCC-5_0-win32-jcgo.7z	Win32	x86	MinGW	-	[3614]	1070	0.58	the complete JavaCC v5.0 binary distributive pack (containing javacc, jjdoc, jjtree executables); see source code
						410
						908

Notes:

• these applications have been translated using the "default" command - "jcgo <AppMainClass> @$~/stdpaths.in";
• the produced "proguard" stand-alone executable file has been packed by UPX (to reduce the disk footprint);
• "proguard" may require setting "PROG_JAVA_HOME" environment variable (pointing to some JRE installation folder, eg. "C:\JDK16\JRE") for having access to the Java core classes library;
• "JavaCC" resources are put to "classes" folder of its installation folder;

Disk footprint comparison: the size of "proguard" packed stand-alone executable file is even a bit smaller than the size of the optimized, obfuscated (and packed) "proguard.jar" file.

5. Third-party SWT applications

These samples are based on the Eclipse SWT v3.6M4 GUI toolkit.

application download filename	OS	CPU	SWT back-end	build command	exe size (unpacked), MiB	application download size, MiB	start-up RAM usage, MiB
tuxguitar-1_2-linux-x86-jcgo.tar.gz	Linux	amd64	gtk_64	[1402]	6.0	6.8	6
		x86	gtk	[1102]	4.0		4
tuxguitar-1_2-windows-x86-jcgo.7z	Win64	amd64	win32_64	[4002]	5.6	5.6	20
	Win32	x86	win32	[3702]	4.3		16
SWT_ControlExample-3_6M4-linux-x86-jcgo.	Linux	amd64	gtk_64	[1401]	2.9	3.8	2
		x86	gtk	[1101]	2.2		4
			motif	[1201]	1.9		1
SWT_ControlExample-3_6M4-win32-jcgo.7z	Win64	amd64	win32_64	[4001]	2.8	2.2	12
	Win32	x86	win32	[3701]	2.2		5
SWT_GraphicsExample-3_6M4-win32-jcgo.7z	Win64	amd64	win32_64	[4001]	1.5	1.7	8
	Win32	x86	win32	[3701]	1.2		5

Notes:

• some features (widgets) may not work in case of motif back-end (still under development by the Eclipse team);
• each sample download file for SWT_ControlExample and "tuxguitar" contains 3 (2) completely stand-alone executable (and a set of accompanying DLL/DSO) files for the specified SWT back-ends;
• "tuxguitar" is a multitrack tablature editor and player (a lot of tablatures available online to try it out, eg. this song).

The translation commands:

• for SWT_GraphicsExample - jcgo -src src;swt_src org.eclipse.swt.examples.graphics.GraphicsExample @$~/stdpaths.in
• for SWT_ControlExample - jcgo -src src;swt_src org.eclipse.swt.examples.controlexample.ControlExample @$~/stdpaths.in -rg org.eclipse.swt.widgets -rg org.eclipse.swt.browser.Browser
• for "tuxguitar" - see in the JCGO "examples" folder.

Some of the above SWT (and console) demo applications are also listed on the third-party sites introducing the competitive technologies and products, like:

• Excelsior JET Download size reduction for Java applications;
• micro-libgcj Example Applications.

6. Third-party AWT applications using gtkpeer

Classpath "gtkpeer" AWT back-end is used for the following GUI applications.

application download filename	OS	CPU	build command	exe size (unpacked), MiB	application download size, MiB
J2dBenchmarkGUI-gtkpeer-linux-x86-jcgo.tar.gz	Linux	amd64	[5301]	4.7	2.9
		x86	[5201]	3.2

Notes:

• some features (widgets) are unimplemented (or may not work correctly) in the gtkpeer back-end;
• the Java-to-C translation command for the "J2dBenchmarkGUI" application is jcgo -src $~/goclsp/clsp_pgk -src $~/classpath-0.93/examples gnu.classpath.examples.java2d.J2dBenchmarkGUI @$~/stdpaths.in

7. Third-party AWT applications using Sun J2SE

These applications are using Sun J2SE v1.4 AWT/Swing GUI front-end.

application download filename	OS	CPU	sun-AWT build command	exe size (unpacked), MiB	application download size, MiB	start-up RAM usage, MiB
jEdit-4_2-win32-jcgo.7z	Win32	x86	[106]	6.6	4.6	17
JDK_DrawTest-win32-jcgo.7z	Win32	x86	[107]	1.8	1.1	4
JDK_Java2Demo-win32-jcgo.7z	Win32	x86	[103]	5.2	3.6	23
JDK_JavaSound-win32-jcgo.7z	Win32	x86	[104]	4.1	3.6	10
JDK_SwingSet2-win32-jcgo.7z	Win32	x86	[105]	4.9	4.7	37
JDK_SwingSet2-linux-x86-jcgo.tar.gz	Linux	x86	[305]	5.0	7.0	4
JDK_SwingSet2-solaris-x86-jcgo.tar.gz	Solaris	x86	[404]	10	6.7

Notes:

• these AWT demo applications are, at present, distributed here under the terms of J2SE "Sun Community Source License" (for research use only);
• JDK demo (jfc) applications require minor bug-fixing - see for it (and for the Java-to-C translation commands) in the JCGO "examples" folder.

8. Other projects using JCGO

Here are the links to some other projects that use JCGO to produce binary executables (see "Browse file for" or "Download" pages):

• JadRetro (a Java decompiler helper)
• IvmaiDNS tools (a java DNS client)
• IvmaiAsn ASN1/ECN/XDR Tools (java tools for parsing ASN.1)
• sasplanetj CE (a PocketPC version of SAS.Planet Geo cache browser)