diff --git a/src/main/java/org/dita/dost/invoker/ConversionArguments.java b/src/main/java/org/dita/dost/invoker/ConversionArguments.java
index 4d1f317030..3242c8d9e4 100644
--- a/src/main/java/org/dita/dost/invoker/ConversionArguments.java
+++ b/src/main/java/org/dita/dost/invoker/ConversionArguments.java
@@ -79,6 +79,7 @@ public class ConversionArguments extends Arguments {
      * Project file
      */
     File projectFile;
+    int repeat = 1;
 
     public final List<String> inputs = new ArrayList<>();
     private final List<String> resources = new ArrayList<>();
@@ -142,6 +143,8 @@ ConversionArguments parse(final String[] arguments) {
                 handleArgFilter(arg, args, ARGUMENTS.get(getArgumentName(arg)));
             } else if (isLongForm(arg, "-resource") || arg.equals("-r")) {
                 handleArgResource(arg, args, ARGUMENTS.get(getArgumentName(arg)));
+            } else if (isLongForm(arg, "-repeat")) {
+                handleArgRepeat(arg, args);
             } else if (ARGUMENTS.containsKey(getArgumentName(arg))) {
                 definedProps.putAll(handleParameterArg(arg, args, ARGUMENTS.get(getArgumentName(arg))));
             } else if (getPluginArguments().containsKey(getArgumentName(arg))) {
@@ -301,6 +304,14 @@ private void handleArgPropertyFile(final String arg, final Deque<String> args) {
         propertyFiles.addElement(entry.getValue());
     }
 
+    private void handleArgRepeat(final String arg, final Deque<String> args) {
+        final Map.Entry<String, String> entry = parse(arg.substring(2), args);
+        if (entry.getValue() == null) {
+            throw new BuildException("You must repeat number");
+        }
+        repeat = Integer.parseInt(entry.getValue());
+    }
+
     /**
      * Handle the --nice argument.
      */
@@ -378,6 +389,7 @@ void printUsage(final boolean compact) {
             buf
                     .options("l", "logfile", "file", locale.getString("conversion.option.logfile"))
                     .options(null, "propertyfile", "file", locale.getString("conversion.option.propertyfile"))
+                    .options(null, "repeat", "num", locale.getString("conversion.option.repeat"))
                     .options("t", "temp", "dir", locale.getString("conversion.option.temp"));
             final Set<String> builtin = ARGUMENTS.values().stream().map(arg -> arg.property).collect(Collectors.toSet());
             final List<Element> params = toList(Plugins.getPluginConfiguration().getElementsByTagName("param"));
diff --git a/src/main/java/org/dita/dost/invoker/Main.java b/src/main/java/org/dita/dost/invoker/Main.java
index 34df78dd9b..34d2ac8e73 100644
--- a/src/main/java/org/dita/dost/invoker/Main.java
+++ b/src/main/java/org/dita/dost/invoker/Main.java
@@ -95,6 +95,7 @@ public class Main extends org.apache.tools.ant.Main implements AntMain {
      * Set of properties that can be used by tasks.
      */
     private List<Map<String, Object>> projectProps;
+    private int repeat;
 
     /**
      * Whether or not this instance has successfully been constructed and is
@@ -195,15 +196,27 @@ public void startAnt(final String[] args, final Properties additionalUserPropert
         // expect the worst
         int exitCode = 1;
         try {
-            try {
-                for (Map<String, Object> props : projectProps) {
-                    runBuild(coreLoader, props);
+            final long[] durations = new long[repeat];
+            for (int i = 0; i < repeat; i++) {
+                final long start = System.currentTimeMillis();
+                try {
+                    for (Map<String, Object> props : projectProps) {
+                        runBuild(coreLoader, props);
+                    }
+                    exitCode = 0;
+                } catch (final ExitStatusException ese) {
+                    exitCode = ese.getStatus();
+                    if (exitCode != 0) {
+                        throw ese;
+                    }
                 }
-                exitCode = 0;
-            } catch (final ExitStatusException ese) {
-                exitCode = ese.getStatus();
-                if (exitCode != 0) {
-                    throw ese;
+                final long end = System.currentTimeMillis();
+                durations[i] = end - start;
+            }
+            if (repeat > 1) {
+                for (int i = 0; i < durations.length; i++) {
+                    System.out.println(String.format(locale.getString("conversion.repeatDuration"),
+                            i + 1, durations[i]));
                 }
             }
         } catch (final BuildException be) {
@@ -344,6 +357,7 @@ private void processArgs(final String[] arguments) {
             } else {
                 projectProps = handleProject(conversionArgs.projectFile, definedProps);
             }
+            repeat = conversionArgs.repeat;
             // default values
             if (!definedProps.containsKey(ANT_OUTPUT_DIR)) {
                 definedProps.put(ANT_OUTPUT_DIR, new File(new File("."), "out").getAbsolutePath());
diff --git a/src/main/resources/cli_en_US.properties b/src/main/resources/cli_en_US.properties
index 597a4292c5..8d239917e5 100644
--- a/src/main/resources/cli_en_US.properties
+++ b/src/main/resources/cli_en_US.properties
@@ -47,6 +47,8 @@ conversion.option.filter=Filter and flagging files. This option can be passed mu
 conversion.option.output=Output directory
 conversion.option.logfile=Write log messages to file
 conversion.option.propertyfile=Load all properties from file
+conversion.option.repeat=Performs the transformation N times
+conversion.repeatDuration=%d %dms
 conversion.option.temp=Temporary directory
 conversion.error.input_and_transformation_not_defined=Input file and transformation type not defined
 conversion.error.transformation_not_defined=Transformation type not defined