mesure performance

src/crypto/wild_keccak.cpp

@@ -129,5 +129,25 @@ namespace crypto
     }
     return true;
   }
+
+#define WK2_COUNT 9
+
+  bool generate_scratchpad2(const crypto::hash& seed_data, std::vector<crypto::hash>& result_data, uint64_t target_size)
+  {
+    //this is very basic implementation, not considered for production (possible to reduce memory by keeping only every x10 item and calc it instead of read)
+    //TODO: research safe way for scratchpad generation
+    result_data.resize(target_size);
+    result_data[0] = crypto::cn_fast_hash(&seed_data, sizeof(seed_data));
+    //crypto::hash = get_transaction_hash()
+    for (size_t i = 1; i < target_size; i++)
+    {
+      result_data[i] = crypto::cn_fast_hash(&result_data[i - 1], sizeof(result_data[i - 1]));
+      for (size_t j = 0; j != WK2_COUNT; j++)
+      {
+        result_data[i] = crypto::cn_fast_hash(&result_data[i], sizeof(result_data[i]));
+      }      
+    }
+    return true;
+  }
 }
 

src/crypto/wild_keccak.h

@@ -281,7 +281,7 @@ namespace crypto
   }
   //------------------------------------------------------------------
   bool generate_scratchpad(const crypto::hash& source_data, std::vector<crypto::hash>& result_data, uint64_t target_size);
-
+  bool generate_scratchpad2(const crypto::hash& source_data, std::vector<crypto::hash>& result_data, uint64_t target_size);
 
 }
 

tests/performance_tests/keccak_test.h

@@ -7,7 +7,7 @@
 
 #include "crypto/crypto.h"
 #include "currency_core/currency_basic.h"
-
+#include "profile_tools.h"
 
 extern "C" {
 #include "crypto/keccak.h"
@@ -154,6 +154,21 @@ protected:
   #define max_measere_scratchpad 10000000
 #endif
 #define measere_rounds 10000
+
+void generate_scratchpad()
+{
+  crypto::hash seed = crypto::cn_fast_hash("sdssdsffdss", 10);
+  std::vector<crypto::hash> scratchpad;
+  size_t count = 500000000 / 32;
+  TIME_MEASURE_START_MS(gen_time);
+  LOG_PRINT_L0("Generating....");
+  crypto::generate_scratchpad2(seed, scratchpad, count);
+  TIME_MEASURE_FINISH_MS(gen_time);
+  LOG_PRINT_L0("Generated scratchpad " << (scratchpad.size() * 32) / (1024 * 1024) << "MB in " << gen_time << "ms");
+}
+
+
+
 void measure_keccak_over_scratchpad()
 {
   std::cout << std::setw(20) << std::left << "sz\t" <<

tests/performance_tests/main.cpp

@@ -35,7 +35,8 @@ int main(int argc, char** argv)
   performance_timer timer;
   timer.start();
 
-  measure_keccak_over_scratchpad();
+  generate_scratchpad();
+  //measure_keccak_over_scratchpad();
 
   /*
   TEST_PERFORMANCE2(test_construct_tx, 1, 1);