Instrument IPhoneBuilder to break down build time statistics (#4313)

Added a Stopwatch helper class to IPhoneBuilder.java and instrumented the build() method to log the duration of individual build steps (Setup, Extensions, Hints, Stubs, ParparVM, CocoaPods, etc.) separately. This allows for identifying performance bottlenecks in the iOS build process, specifically isolating the time spent on CocoaPods installation versus VM translation.

Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>

Author: google-labs-jules[bot]

maven/codenameone-maven-plugin/src/main/java/com/codename1/builders/IPhoneBuilder.java

@@ -213,6 +213,7 @@ private int getDeploymentTargetInt(BuildRequest request) {
 
     @Override
     public boolean build(File sourceZip, BuildRequest request) throws BuildException {
+        Stopwatch stopwatch = new Stopwatch();
         addMinDeploymentTarget(DEFAULT_MIN_DEPLOYMENT_VERSION);
         detectJailbreak = request.getArg("ios.detectJailbreak", "false").equals("true");
         defaultEnvironment.put("LANG", "en_US.UTF-8");
@@ -346,7 +347,7 @@ public boolean build(File sourceZip, BuildRequest request) throws BuildException
         } catch (IOException ex) {
             throw new BuildException("Failed to unzip source Zip file.", ex);
         }
-        
+        stopwatch.split("Setup & Unzip");
 
 
         // We allow devs to add local podspecs inside a folder called "podspecs".  This will
@@ -479,6 +480,7 @@ public boolean build(File sourceZip, BuildRequest request) throws BuildException
 
             }
         }
+        stopwatch.split("Extract Extensions");
 
         File podSpecs = new File(tmpFile, "podspecs");
         podSpecs.mkdirs();
@@ -563,6 +565,7 @@ public boolean build(File sourceZip, BuildRequest request) throws BuildException
 
 
         }
+        stopwatch.split("Google Services Setup");
 
         if (googleClientId == null && useGoogleSignIn) {
             log("GoogleService-Info.plist file specifies that GoogleSignIn should be used but it doesn't provide a client ID.  Likely the GoogleService-Info.plist file is not valid.  See "+GOOGLE_SIGNIN_TUTORIAL_URL+" for instructions on setting up GoogleSignIn");
@@ -603,7 +606,7 @@ public void usesClassMethod(String cls, String method) {
         } catch (Exception ex) {
             throw new BuildException("Failed to scan project classes for permissions.", ex);
         }
-        
+        stopwatch.split("Scan Classes");
 
         debug("Local Notifications "+(usesLocalNotifications?"enabled":"disabled"));
         try {
@@ -646,6 +649,7 @@ public void usesClassMethod(String cls, String method) {
         } catch (IOException ex) {
             throw new BuildException("Failed to extract nativeios.jar",ex);
         }
+        stopwatch.split("Extract Libs");
 
         if(request.getArg("noExtraResources", "false").equals("true")) {
             new File(buildinRes, "CN1Resource.res").delete();
@@ -910,6 +914,7 @@ public void usesClassMethod(String cls, String method) {
                 adPadding = "        Display.getInstance().setProperty(\"adPaddingBottom\", \"" + adPadding + "\");\n"; 
             }
         }
+        stopwatch.split("Inject Build Hints");
 
         File stubSource = new File(tmpFile, "stub");
         stubSource.mkdirs();
@@ -918,6 +923,7 @@ public void usesClassMethod(String cls, String method) {
         } catch (Exception ex) {
             throw new BuildException("Failed to generate Unit Test Files", ex);
         }
+        stopwatch.split("Generate Unit Tests");
 
         String newStorage = "";
         if(request.getArg("ios.newStorageLocation", "true").equals("true")) {
@@ -1005,6 +1011,7 @@ public void usesClassMethod(String cls, String method) {
         } catch (IOException ex) {
             throw new BuildException("Failed to write stub source", ex);
         }
+        stopwatch.split("Generate Stubs");
 
         Class[] nativeInterfaces = getNativeInterfaces();
         if(nativeInterfaces != null && nativeInterfaces.length > 0) {
@@ -1173,6 +1180,7 @@ public void usesClassMethod(String cls, String method) {
         } catch (Exception ex) {
             throw new BuildException("Failure occurred while compiling native interface stubs", ex);
         }
+        stopwatch.split("Compile Stubs");
 
 
         try {
@@ -1190,6 +1198,7 @@ public void usesClassMethod(String cls, String method) {
         } catch (Exception ex) {
             throw new BuildException("Failed to generate launch screen");
         }
+        stopwatch.split("Generate Icons");
 
         resultDir = new File(tmpFile, "result");
         resultDir.mkdirs();
@@ -1526,6 +1535,7 @@ public void usesClassMethod(String cls, String method) {
             debug("iosDeploymentTargetMajorVersionInt="+getDeploymentTargetInt(request));
 
             debug("Building using addLibs="+addLibs);
+            stopwatch.split("Prepare ParparVM");
             try {
                 if (!exec(userDir, env, 420000, "java", "-DsaveUnitTests=" + isUnitTestMode(), "-DfieldNullChecks=" + fieldNullChecks, "-DINCLUDE_NPE_CHECKS=" + includeNullChecks, "-DbundleVersionNumber=" + bundleVersionNumber, "-Xmx384m",
                         "-jar", parparVMCompilerJar, "ios",
@@ -1543,6 +1553,7 @@ public void usesClassMethod(String cls, String method) {
             } catch (Exception ex) {
                 throw new BuildException("Failure while trying to run ByteCodeTranslator of ParparVM", ex);
             }
+            stopwatch.split("ParparVM Execution");
             try {
                 String orientations = request.getArg("ios.interface_orientation", null);
                 if (orientations != null && orientations.split(":").length < 4) {
@@ -1617,6 +1628,7 @@ public void usesClassMethod(String cls, String method) {
             } catch (Exception ex) {
                 throw new BuildException("Failed to update infoplist file", ex);
             }
+            stopwatch.split("Post-VM Setup");
             if (runPods) {
                 try {
                     List<File> podSpecFileList = new ArrayList<File>();
@@ -1932,6 +1944,7 @@ public void usesClassMethod(String cls, String method) {
                 } catch (Exception ex) {
                     throw new BuildException("Failed to generate PodFile", ex);
                 }
+                stopwatch.split("CocoaPods");
             }
 
             try {
@@ -1979,6 +1992,9 @@ public void usesClassMethod(String cls, String method) {
 
         }
 
+        stopwatch.split("Finalize");
+        stopwatch.stop();
+
         if ("xcode".equals(getBuildTarget()) || getBuildTarget() == null) {
             xcodeProjectDir = new File(tmpFile, "dist");
             return true;
@@ -2151,6 +2167,36 @@ private class GoogleServicePlist {
 
     }
 
+    private class Stopwatch {
+        private long startTime;
+        private long lastSplitTime;
+        private final StringBuilder summary = new StringBuilder();
+
+        public Stopwatch() {
+            startTime = System.currentTimeMillis();
+            lastSplitTime = startTime;
+            summary.append("Build Time Statistics:\n");
+            summary.append("----------------------\n");
+        }
+
+        public void split(String stepName) {
+            long now = System.currentTimeMillis();
+            long duration = now - lastSplitTime;
+            String message = String.format("%-40s : %d ms", stepName, duration);
+            log(message);
+            summary.append(message).append("\n");
+            lastSplitTime = now;
+        }
+
+        public void stop() {
+            long now = System.currentTimeMillis();
+            long totalDuration = now - startTime;
+            summary.append("----------------------\n");
+            summary.append(String.format("%-40s : %d ms", "Total Time", totalDuration));
+            log(summary.toString());
+        }
+    }
+
     private File[] extractAppExtensions(File sourceDirectory, File targetDirectory) throws IOException {
         if (sourceDirectory == null || !sourceDirectory.isDirectory()) {
             throw new IllegalArgumentException("extractAppExtensions sourceDirectory must be an existing directory but received "+sourceDirectory);