diff --git a/Makefile b/Makefile
index 7b2c456ba..5850a8eea 100644
--- a/Makefile
+++ b/Makefile
@@ -19,6 +19,50 @@ all: $(EXECUTABLES)
 parse: main.cpp common_defs.h linux-perf-events.h
 	$(CXX) $(CXXFLAGS) -o parse main.cpp
 
+testflatten: parse parsenocheesy parsenodep2 parsenodep4 parsenodep6 parsenodep8 parsenodep10 parsenodep12 parsenodep14 parsenodep16
+	for filename in jsonexamples/twitter.json jsonexamples/gsoc-2018.json jsonexamples/citm_catalog.json jsonexamples/canada.json ; do \
+        	echo $$filename ; \
+		set -x; \
+		./parse $$filename ; \
+		./parsenocheesy $$filename ; \
+		./parsenocheesy $$filename ; \
+		./parsenodep2 $$filename ; \
+		./parsenodep4 $$filename ; \
+		./parsenodep6 $$filename ; \
+		./parsenodep8 $$filename ; \
+		./parsenodep10 $$filename ; \
+		./parsenodep12 $$filename ; \
+		./parsenodep14 $$filename ; \
+		./parsenodep16 $$filename ; \
+		set +x; \
+	done
+
+parsenocheesy: main.cpp common_defs.h linux-perf-events.h
+	$(CXX) $(CXXFLAGS) -o parsenocheesy main.cpp -DSUPPRESS_CHEESY_FLATTEN
+
+parsenodep2: main.cpp common_defs.h linux-perf-events.h
+	$(CXX) $(CXXFLAGS) -o parsenodep2 main.cpp -DNO_PDEP_PLEASE -DNO_PDEP_WIDTH=2
+
+parsenodep4: main.cpp common_defs.h linux-perf-events.h
+	$(CXX) $(CXXFLAGS) -o parsenodep4 main.cpp -DNO_PDEP_PLEASE -DNO_PDEP_WIDTH=4
+
+parsenodep6: main.cpp common_defs.h linux-perf-events.h
+	$(CXX) $(CXXFLAGS) -o parsenodep6 main.cpp -DNO_PDEP_PLEASE -DNO_PDEP_WIDTH=6
+
+parsenodep8: main.cpp common_defs.h linux-perf-events.h
+	$(CXX) $(CXXFLAGS) -o parsenodep8 main.cpp -DNO_PDEP_PLEASE -DNO_PDEP_WIDTH=8
+
+parsenodep10: main.cpp common_defs.h linux-perf-events.h
+	$(CXX) $(CXXFLAGS) -o parsenodep10 main.cpp -DNO_PDEP_PLEASE -DNO_PDEP_WIDTH=10
+
+parsenodep12: main.cpp common_defs.h linux-perf-events.h
+	$(CXX) $(CXXFLAGS) -o parsenodep12 main.cpp -DNO_PDEP_PLEASE -DNO_PDEP_WIDTH=12
+
+parsenodep14: main.cpp common_defs.h linux-perf-events.h
+	$(CXX) $(CXXFLAGS) -o parsenodep14 main.cpp -DNO_PDEP_PLEASE -DNO_PDEP_WIDTH=14
+
+parsenodep16: main.cpp common_defs.h linux-perf-events.h
+	$(CXX) $(CXXFLAGS) -o parsenodep16 main.cpp -DNO_PDEP_PLEASE -DNO_PDEP_WIDTH=16
 
 clean:
 	rm -f $(EXECUTABLES)
diff --git a/main.cpp b/main.cpp
index 86ecc8f6a..a1f9417b5 100644
--- a/main.cpp
+++ b/main.cpp
@@ -296,6 +296,20 @@ never_inline bool flatten_indexes(size_t len, ParsedJson & pj) {
         while (s) {
             base_ptr[base++] = (u32)idx + __builtin_ctzll(s); s &= s - 1ULL;
         }
+#elif defined(NO_PDEP_PLEASE)
+#ifndef NO_PDEP_WIDTH
+#define NO_PDEP_WIDTH 6
+#endif
+        u32 cnt = __builtin_popcountll(s);
+        u32 next_base = base + cnt;
+        while (s) {
+          for(size_t i = 0; i < NO_PDEP_WIDTH; i++) {
+            base_ptr[base+i] = (u32)idx + __builtin_ctzll(s);
+            s = s & (s - 1);
+          }
+          base += NO_PDEP_WIDTH;
+        }
+        base = next_base;
 #else
         u32 cnt = __builtin_popcountll(s);
         u32 next_base = base + cnt;