diff --git a/Demos3/GpuDemos/main_opengl3core.cpp b/Demos3/GpuDemos/main_opengl3core.cpp
index 3dbbc37a6..5b4c3b2a7 100644
--- a/Demos3/GpuDemos/main_opengl3core.cpp
+++ b/Demos3/GpuDemos/main_opengl3core.cpp
@@ -59,6 +59,7 @@ extern float shadowMapWidth;
 extern float shadowMapHeight;
 extern bool gDebugLauncherCL;
 extern bool gAllowCpuOpenCL;
+extern bool gUseLargeBatches;
 
 extern bool gDebugForceLoadingFromSource;
 extern bool gDebugSkipLoadingBinary;
@@ -633,7 +634,7 @@ int main(int argc, char* argv[])
 	args.GetCmdLineArgument("cl_device", ci.preferredOpenCLDeviceIndex);
 	args.GetCmdLineArgument("cl_platform", ci.preferredOpenCLPlatformIndex);
 	gAllowCpuOpenCL = args.CheckCmdLineFlag("allow_opencl_cpu");
-
+	gUseLargeBatches = args.CheckCmdLineFlag("use_large_batches");
 
 	gUseJacobi = args.CheckCmdLineFlag("use_jacobi");
 	gUseDbvt = args.CheckCmdLineFlag("use_dbvt");
diff --git a/src/Bullet3OpenCL/RigidBody/b3GpuPgsContactSolver.cpp b/src/Bullet3OpenCL/RigidBody/b3GpuPgsContactSolver.cpp
index 19c4bad82..5c5acb1fe 100644
--- a/src/Bullet3OpenCL/RigidBody/b3GpuPgsContactSolver.cpp
+++ b/src/Bullet3OpenCL/RigidBody/b3GpuPgsContactSolver.cpp
@@ -1,5 +1,5 @@
 
-bool oneBigBatch = true;
+bool gUseLargeBatches = false;
 bool gCpuBatchContacts = false;
 bool gCpuSolveConstraint = false;
 bool gCpuRadixSort=false;
@@ -771,7 +771,7 @@ void b3GpuPgsContactSolver::solveContacts(int numBodies, cl_mem bodyBuf, cl_mem
         
 		int maxNumBatches = 0;
  
-		if (!oneBigBatch)
+		if (!gUseLargeBatches)
         {
             
             if( m_data->m_solverGPU->m_contactBuffer2)
@@ -1064,7 +1064,7 @@ void b3GpuPgsContactSolver::solveContacts(int numBodies, cl_mem bodyBuf, cl_mem
 
 						int numNonzeroGrid=0;
 
-						if (oneBigBatch)
+						if (gUseLargeBatches)
 						{
 							m_data->m_batchSizes.resize(B3_MAX_NUM_BATCHES);
 							int totalNumConstraints = cpuContacts.size();
@@ -1125,7 +1125,7 @@ void b3GpuPgsContactSolver::solveContacts(int numBodies, cl_mem bodyBuf, cl_mem
 
 			//printf("maxNumBatches = %d\n", maxNumBatches);
 
-		if (oneBigBatch)
+		if (gUseLargeBatches)
 		{
 			if (nContacts)
 			{
@@ -1197,7 +1197,7 @@ void b3GpuPgsContactSolver::solveContacts(int numBodies, cl_mem bodyBuf, cl_mem
 
 				//m_data->m_batchSizesGpu->copyFromHost(m_data->m_batchSizes);
 
-				if (oneBigBatch)
+				if (gUseLargeBatches)
 				{
 					solveContactConstraintBatchSizes(m_data->m_bodyBufferGPU, 
 						m_data->m_inertiaBufferGPU,