thomasmueller commented on code in PR #1094:
URL: https://github.com/apache/jackrabbit-oak/pull/1094#discussion_r1440653552


##########
oak-jcr/src/main/java/org/apache/jackrabbit/oak/jcr/repository/RepositoryImpl.java:
##########
@@ -564,4 +571,30 @@ public synchronized void cancel() {
             }
         }
     }
+
+    /**
+     * This is a fallback implementation of {@link 
org.apache.jackrabbit.oak.spi.query.SessionQuerySettingsProvider} that
+     * unifies and replaces the previous handling of {@code 
fastQueryResultSize} and {@code oak.fastQuerySize} here
+     * and in the {@link org.apache.jackrabbit.oak.jcr.session.SessionContext}.
+     */
+    private static class FastQuerySizeSettingsProvider implements 
SessionQuerySettingsProvider {
+        private final boolean fastQueryResultSize;
+
+        public FastQuerySizeSettingsProvider(boolean fastQueryResultSize) {
+            this.fastQueryResultSize = fastQueryResultSize;
+        }
+
+        @Override
+        public @NotNull SessionQuerySettings getQuerySettings(@NotNull 
ContentSession session) {
+            return new SessionQuerySettings() {
+                @Override
+                public boolean useDirectResultCount() {
+                    if (System.getProperty("oak.fastQuerySize") != null) {
+                        return Boolean.getBoolean("oak.fastQuerySize");
+                    }

Review Comment:
   I would access the system property only once... Something like this:
   ```suggestion
                       String x = System.getProperty("oak.fastQuerySize");
                       if (x != null) {
                           return Boolean.parseBoolean(x);
                       }
   ```
   
   I know the risk of concurrent change to the system property is tiny... but 
still.



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