diff --git a/include/fast_float/ascii_number.h b/include/fast_float/ascii_number.h
index d571fcb..27cc8ba 100644
--- a/include/fast_float/ascii_number.h
+++ b/include/fast_float/ascii_number.h
@@ -15,20 +15,43 @@ namespace fast_float {
 fastfloat_really_inline bool is_integer(char c)  noexcept  { return c >= '0' && c <= '9'; }
 
 
+// credit  @aqrit
+fastfloat_really_inline uint32_t  parse_eight_digits_unrolled(uint64_t val) {
+  const uint64_t mask = 0x000000FF000000FF;
+  const uint64_t mul1 = 0x000F424000000064; // 100 + (1000000ULL << 32)
+  const uint64_t mul2 = 0x0000271000000001; // 1 + (10000ULL << 32)
+
+  val -= 0x3030303030303030;
+  val = (val * 10) + (val >> 8); // val = (val * 2561) >> 8;
+  val = (((val & mask) * mul1) + (((val >> 16) & mask) * mul2)) >> 32;
+  return val;
+}
+
 // credit: https://johnnylee-sde.github.io/Fast-numeric-string-to-int/
+//fastfloat_really_inline uint32_t parse_eight_digits_unrolled(uint64_t val)  noexcept  {
+//  uint64_t val;
+//  ::memcpy(&val, chars, sizeof(uint64_t));
+//  val = (val & 0x0F0F0F0F0F0F0F0F) * 2561 >> 8;
+//  val = (val & 0x00FF00FF00FF00FF) * 6553601 >> 16;
+//  return uint32_t((val & 0x0000FFFF0000FFFF) * 42949672960001 >> 32);
+//}
+
 fastfloat_really_inline uint32_t parse_eight_digits_unrolled(const char *chars)  noexcept  {
   uint64_t val;
   ::memcpy(&val, chars, sizeof(uint64_t));
-  val = (val & 0x0F0F0F0F0F0F0F0F) * 2561 >> 8;
-  val = (val & 0x00FF00FF00FF00FF) * 6553601 >> 16;
-  return uint32_t((val & 0x0000FFFF0000FFFF) * 42949672960001 >> 32);
+  return parse_eight_digits_unrolled(val);
 }
 
+// credit @aqrit
 fastfloat_really_inline bool is_made_of_eight_digits_fast(uint64_t val)  noexcept  {
-  return (((val & 0xF0F0F0F0F0F0F0F0) |
-           (((val + 0x0606060606060606) & 0xF0F0F0F0F0F0F0F0) >> 4)) ==
-          0x3333333333333333);
+  return !((((val + 0x4646464646464646) | (val - 0x3030303030303030)) &
+     0x8080808080808080)); 
 }
+//fastfloat_really_inline bool is_made_of_eight_digits_fast(uint64_t val)  noexcept  {
+//  return (((val & 0xF0F0F0F0F0F0F0F0) |
+//           (((val + 0x0606060606060606) & 0xF0F0F0F0F0F0F0F0) >> 4)) ==
+//          0x3333333333333333);
+//}
 
 
 fastfloat_really_inline bool is_made_of_eight_digits_fast(const char *chars)  noexcept  {