diff --git a/llvm/lib/Analysis/MemoryDependenceAnalysis.cpp b/llvm/lib/Analysis/MemoryDependenceAnalysis.cpp
--- a/llvm/lib/Analysis/MemoryDependenceAnalysis.cpp
+++ b/llvm/lib/Analysis/MemoryDependenceAnalysis.cpp
@@ -93,18 +93,18 @@
              "dependency analysis (default = 100)"));
 
 static cl::opt<unsigned>
-    BlockNumberLimit("memdep-block-number-limit", cl::Hidden, cl::init(1000),
+    BlockNumberLimit("memdep-block-number-limit", cl::Hidden, cl::init(250),
                      cl::desc("The number of blocks to scan during memory "
-                              "dependency analysis (default = 1000)"));
+                              "dependency analysis (default = 250)"));
 
 // In each of BlockNumberLimit block we are willing to scan up to BlockScanLimit
 // instructions, but the total count of instructions scanned in all blocks is
 // at most TotalInstructionCountLimit.
 // This is related to the NumInstructionsScannedMax statistic.
 static cl::opt<unsigned> TotalInstructionCountLimit(
-    "memdep-total-instruction-count-limit", cl::Hidden, cl::init(100000),
+    "memdep-total-instruction-count-limit", cl::Hidden, cl::init(1000),
     cl::desc("The number of instructions we are allowed to scan during memory "
-             "dependency analysis (default = 100000)"));
+             "dependency analysis (default = 1000)"));
 
 static cl::opt<unsigned> NumResultsLimit(
     "memdep-num-results-limit", cl::Hidden, cl::init(100),