set org.jruby.runtime.load.LoadService.DEBUG_LOAD_TIMINGS at run time

gistfile1.diff

diff --git a/src/org/jruby/RubyInstanceConfig.java b/src/org/jruby/RubyInstanceConfig.java
index 2451a3b..a02a4e6 100644
--- a/src/org/jruby/RubyInstanceConfig.java
+++ b/src/org/jruby/RubyInstanceConfig.java
@@ -230,6 +230,9 @@ public class RubyInstanceConfig {
     public static final boolean DEBUG_LOAD_SERVICE
             = SafePropertyAccessor.getBoolean("jruby.debug.loadService", false);
 
+    public static final boolean DEBUG_LOAD_TIMINGS
+            = SafePropertyAccessor.getBoolean("jruby.debug.loadService.timing", false);
+    
     public static final boolean DEBUG_LAUNCHING
             = SafePropertyAccessor.getBoolean("jruby.debug.launch", false);
 
@@ -237,11 +240,11 @@ public class RubyInstanceConfig {
             = SafePropertyAccessor.getBoolean("jruby.jump.backtrace", false);
 
     public static interface LoadServiceCreator {
-        LoadService create(Ruby runtime);
+        LoadService create(Ruby runtime, boolean loadTimings);
 
         LoadServiceCreator DEFAULT = new LoadServiceCreator() {
-                public LoadService create(Ruby runtime) {
-                    return new LoadService(runtime);
+                public LoadService create(Ruby runtime, boolean loadTimings) {
+                    return new LoadService(runtime, loadTimings);
                 }
             };
     }
@@ -375,7 +378,7 @@ public class RubyInstanceConfig {
     }
 
     public LoadService createLoadService(Ruby runtime) {
-        return this.creator.create(runtime);
+        return this.creator.create(runtime, DEBUG_LOAD_TIMINGS);
     }
 
     public String getBasicUsageHelp() {
@@ -514,6 +517,8 @@ public class RubyInstanceConfig {
                 .append("       Set whether full traces are enabled (c-call/c-return). Default is false.\n")
                 .append("    jruby.debug.loadService=true|false\n")
                 .append("       Log the process of locating and loading libraries. Default is false.\n")
+                .append("    jruby.debug.loadService.timing=true|false\n")
+                .append("       Print load timings for each require'd library. Default is false.\n")
                 .append("    jruby.jump.backtrace=true|false\n")
                 .append("       Make non-local flow jumps generate backtraces. Default is false.\n")
                 .append("\nDEBUGGING/LOGGING:\n")
diff --git a/src/org/jruby/runtime/load/LoadService.java b/src/org/jruby/runtime/load/LoadService.java
index 5a31b03..c8ff16f 100644
--- a/src/org/jruby/runtime/load/LoadService.java
+++ b/src/org/jruby/runtime/load/LoadService.java
@@ -125,18 +125,8 @@ import org.jruby.util.JRubyFile;
  * @author jpetersen
  */
 public class LoadService {
-    // Enabling this would print out load timings for every require'd library.
-    // Currently, this is a simple compile-time flag, but we can make it into
-    // a configurable option, if there is a need.
-    private final static boolean DEBUG_LOAD_TIMINGS = false;
-    private final static LoadTimer LOAD_TIMER;
-    static {
-        if (DEBUG_LOAD_TIMINGS) {
-            LOAD_TIMER = new TracingLoadTimer();
-        } else {
-            LOAD_TIMER = new LoadTimer();
-        }
-    }
+    private static boolean DEBUG_LOAD_TIMINGS = false;
+    private static LoadTimer LOAD_TIMER = new LoadTimer();
 
     public enum SuffixType {
         Source, Extension, Both, Neither;
@@ -174,8 +164,14 @@ public class LoadService {
 
     protected final Ruby runtime;
     
-    public LoadService(Ruby runtime) {
+    public LoadService(Ruby runtime, boolean loadTimings) {
         this.runtime = runtime;
+        DEBUG_LOAD_TIMINGS = loadTimings;
+        if (DEBUG_LOAD_TIMINGS) {
+            LOAD_TIMER = new TracingLoadTimer();
+        } else {
+            LOAD_TIMER = new LoadTimer();
+        }
     }
 
     public void init(List additionalDirectories) {
-- 
1.6.4

gistfile2.txt

surfboard:jruby[git:personal]$ jruby -J-Djruby.debug.loadService.timing=true -b -e "require 'rubygems'"
  -> builtin/core_ext/symbol
  <- builtin/core_ext/symbol - 185ms
  -> enumerator
  <- enumerator - 53ms
  -> rubygems
    -> rubygems/defaults
    <- rubygems/defaults - 42ms
    -> thread
    <- thread - 30ms
    -> etc
    <- etc - 12ms
    -> rbconfig
    <- rbconfig - 32ms
    -> rubygems/exceptions
    <- rubygems/exceptions - 56ms
    -> rubygems/version
      -> rubygems/requirement
      <- rubygems/requirement - 36ms
    <- rubygems/version - 187ms
    -> rubygems/requirement
    <- rubygems/requirement - 0ms
    -> rubygems/dependency
    <- rubygems/dependency - 8ms
    -> rubygems/gem_path_searcher
    <- rubygems/gem_path_searcher - 5ms
    -> rubygems/source_index
      -> rubygems/user_interaction
      <- rubygems/user_interaction - 29ms
      -> rubygems/specification
        -> rubygems/version
        <- rubygems/version - 0ms
        -> rubygems/requirement
        <- rubygems/requirement - 0ms
        -> rubygems/platform
        <- rubygems/platform - 16ms
      <- rubygems/specification - 277ms
    <- rubygems/source_index - 333ms
    -> rubygems/platform
    <- rubygems/platform - 0ms
    -> rubygems/builder
    <- rubygems/builder - 21ms
    -> rubygems/defaults/operating_system
    <- rubygems/defaults/operating_system - 47ms
    -> rubygems/defaults/jruby
      -> rubygems/config_file
        -> yaml
          -> stringio
          <- stringio - 13ms
          -> yaml/compat
          <- yaml/compat - 3ms
          -> yaml/error
          <- yaml/error - 2ms
          -> yaml/yecht
            -> yecht
            <- yecht - 146ms
            -> yaml/basenode
              -> yaml/ypath
              <- yaml/ypath - 2ms
            <- yaml/basenode - 10ms
          <- yaml/yecht - 171ms
          -> yaml/tag
          <- yaml/tag - 5ms
          -> yaml/stream
          <- yaml/stream - 2ms
          -> yaml/constants
          <- yaml/constants - 3ms
          -> yaml/rubytypes
            -> date
              -> rational
              <- rational - 66ms
              -> date/format
                -> rational
                <- rational - 0ms
              <- date/format - 98ms
            <- date - 388ms
            -> yaml/compat
            <- yaml/compat - 0ms
          <- yaml/rubytypes - 510ms
          -> yaml/types
            -> yaml/compat
            <- yaml/compat - 0ms
          <- yaml/types - 10ms
        <- yaml - 750ms
        -> Win32API
          -> rbconfig
          <- rbconfig - 0ms
        <- Win32API - 23ms
      <- rubygems/config_file - 826ms
      -> rubygems/source_index
      <- rubygems/source_index - 1ms
    <- rubygems/defaults/jruby - 847ms
    -> rubygems/config_file
    <- rubygems/config_file - 0ms
    -> rubygems/custom_require
      -> rubygems
      <- rubygems - 0ms
    <- rubygems/custom_require - 31ms
    -> fileutils
      -> etc
      <- etc - 1ms
    <- fileutils - 150ms
    -> fileutils
    <- fileutils - 0ms
    -> fileutils
    <- fileutils - 1ms
    -> jruby/util
    <- jruby/util - 202ms
    -> rubygems/command_manager
      -> timeout
      <- timeout - 32ms
      -> rubygems/command
        -> optparse
        <- optparse - 176ms
        -> rubygems/user_interaction
        <- rubygems/user_interaction - 0ms
      <- rubygems/command - 199ms
      -> rubygems/user_interaction
      <- rubygems/user_interaction - 0ms
    <- rubygems/command_manager - 252ms
    -> commands/abstract_command
      -> rubygems/local_remote_options
        -> uri
          -> uri/common
          <- uri/common - 171ms
          -> uri/generic
            -> uri/common
            <- uri/common - 0ms
          <- uri/generic - 104ms
          -> uri/ftp
            -> uri/generic
            <- uri/generic - 0ms
          <- uri/ftp - 13ms
          -> uri/http
            -> uri/generic
            <- uri/generic - 0ms
          <- uri/http - 2ms
          -> uri/https
            -> uri/http
            <- uri/http - 0ms
          <- uri/https - 3ms
          -> uri/ldap
            -> uri/generic
            <- uri/generic - 1ms
          <- uri/ldap - 25ms
          -> uri/ldaps
            -> uri/ldap
            <- uri/ldap - 1ms
          <- uri/ldaps - 2ms
          -> uri/mailto
            -> uri/generic
            <- uri/generic - 0ms
          <- uri/mailto - 11ms
        <- uri - 359ms
        -> rubygems
        <- rubygems - 0ms
      <- rubygems/local_remote_options - 376ms
    <- commands/abstract_command - 402ms
    -> commands/migrate
    <- commands/migrate - 13ms
    -> commands/owner
    <- commands/owner - 11ms
    -> commands/push
    <- commands/push - 2ms
    -> commands/tumble
    <- commands/tumble - 2ms
  <- rubygems - 6189ms
Runtime: 6239 ms