Count uint8 
Count the number of bytes equal to 127 in a binary stream as fast as possible.
Input: 250 000 000 uint8 values in binary on STDIN.
Output: The count of elements equal to 127, printed as a decimal string.
Source Code
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Challenge History
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Run Statistics
| # | Date | Score | Wall Time | CPU User | CPU System | Memory | Error | |
|---|---|---|---|---|---|---|---|---|
| 1 | Mar 28, 2026 08:57 | 4,395 | 30,702,573 | 13,061,000 | 1,004,000 | 2,400,256 | ||
| 2 | Mar 28, 2026 08:58 | 4,398 | 36,872,007 | 12,065,000 | 2,010,000 | 2,285,568 | ||
| 3 | Mar 28, 2026 08:56 | 4,403 | 31,575,123 | 12,076,000 | 2,012,000 | 2,400,256 | ||
| 4 | Mar 28, 2026 08:58 | 4,408 | 36,534,870 | 12,091,000 | 2,015,000 | 2,396,160 | ||
| 5 | Mar 28, 2026 08:53 | 4,411 | 34,433,000 | 12,099,000 | 2,016,000 | 2,392,064 | ||
| 6 | Mar 28, 2026 08:52 | 4,414 | 27,870,511 | 12,108,000 | 2,018,000 | 2,400,256 | ||
| 7 | Mar 28, 2026 08:53 | 4,415 | 33,661,926 | 12,109,000 | 2,018,000 | 2,396,160 | ||
| 8 | Mar 28, 2026 08:53 | 4,416 | 33,607,306 | 12,113,000 | 2,018,000 | 2,400,256 | ||
| 9 | Mar 28, 2026 08:53 | 4,416 | 32,524,798 | 13,122,000 | 1,009,000 | 2,387,968 | ||
| 10 | Mar 28, 2026 08:58 | 4,418 | 35,068,757 | 12,118,000 | 2,019,000 | 2,404,352 | ||
| 11 | Mar 28, 2026 08:57 | 4,419 | 27,265,381 | 12,122,000 | 2,020,000 | 2,408,448 | ||
| 12 | Mar 28, 2026 08:57 | 4,420 | 35,188,120 | 12,124,000 | 2,020,000 | 2,285,568 | ||
| 13 | Mar 28, 2026 08:57 | 4,420 | 36,117,490 | 12,123,000 | 2,020,000 | 2,387,968 | ||
| 14 | Mar 28, 2026 08:56 | 4,420 | 29,906,765 | 13,133,000 | 1,010,000 | 2,396,160 | ||
| 15 | Mar 28, 2026 08:54 | 4,421 | 29,531,411 | 12,127,000 | 2,021,000 | 2,400,256 | ||
| 16 | Mar 28, 2026 08:53 | 4,421 | 34,061,713 | 13,137,000 | 1,010,000 | 2,392,064 | ||
| 17 | Mar 28, 2026 08:52 | 4,422 | 35,602,138 | 12,130,000 | 2,021,000 | 2,400,256 | ||
| 18 | Mar 28, 2026 08:56 | 4,422 | 28,451,644 | 13,139,000 | 1,010,000 | 2,285,568 | ||
| 19 | Mar 28, 2026 08:55 | 4,422 | 31,277,384 | 12,128,000 | 2,021,000 | 2,400,256 | ||
| 20 | Mar 28, 2026 08:57 | 4,425 | 34,724,822 | 13,150,000 | 1,011,000 | 2,396,160 | ||
| 21 | Mar 28, 2026 08:57 | 4,425 | 29,975,598 | 12,138,000 | 2,023,000 | 2,387,968 | ||
| 22 | Mar 28, 2026 08:54 | 4,426 | 34,969,646 | 12,140,000 | 2,023,000 | 2,285,568 | ||
| 23 | Mar 28, 2026 08:55 | 4,426 | 32,178,796 | 12,139,000 | 2,023,000 | 2,400,256 | ||
| 24 | Mar 28, 2026 08:58 | 4,426 | 35,351,954 | 12,141,000 | 2,023,000 | 2,400,256 | ||
| 25 | Mar 28, 2026 08:57 | 4,426 | 28,659,142 | 12,141,000 | 2,023,000 | 2,482,176 | ||
| 26 | Mar 28, 2026 08:53 | 4,428 | 31,415,387 | 13,159,000 | 1,012,000 | 2,404,352 | ||
| 27 | Mar 28, 2026 08:56 | 4,428 | 35,617,968 | 12,146,000 | 2,024,000 | 2,285,568 | ||
| 28 | Mar 28, 2026 08:54 | 4,429 | 31,199,338 | 12,148,000 | 2,024,000 | 2,404,352 | ||
| 29 | Mar 28, 2026 08:53 | 4,430 | 35,819,466 | 12,152,000 | 2,025,000 | 2,404,352 | ||
| 30 | Mar 28, 2026 08:56 | 4,430 | 36,598,723 | 12,152,000 | 2,025,000 | 2,285,568 | ||
| 31 | Mar 28, 2026 08:54 | 4,431 | 38,730,883 | 12,153,000 | 2,025,000 | 2,408,448 | ||
| 32 | Mar 28, 2026 08:54 | 4,431 | 30,860,795 | 12,153,000 | 2,025,000 | 2,400,256 | ||
| 33 | Mar 28, 2026 08:54 | 4,431 | 42,042,853 | 13,166,000 | 1,012,000 | 2,396,160 | ||
| 34 | Mar 28, 2026 08:56 | 4,432 | 31,659,916 | 13,169,000 | 1,013,000 | 2,285,568 | ||
| 35 | Mar 28, 2026 08:56 | 4,432 | 30,899,489 | 13,169,000 | 1,013,000 | 2,285,568 | ||
| 36 | Mar 28, 2026 08:53 | 4,433 | 29,763,276 | 12,159,000 | 2,026,000 | 2,396,160 | ||
| 37 | Mar 28, 2026 08:58 | 4,433 | 37,982,877 | 12,159,000 | 2,026,000 | 2,404,352 | ||
| 38 | Mar 28, 2026 08:58 | 4,433 | 32,621,675 | 12,160,000 | 2,026,000 | 2,383,872 | ||
| 39 | Mar 28, 2026 08:52 | 4,434 | 34,199,936 | 12,162,000 | 2,027,000 | 2,400,256 | ||
| 40 | Mar 28, 2026 08:58 | 4,435 | 33,575,302 | 12,166,000 | 2,027,000 | 2,400,256 | ||
| 41 | Mar 28, 2026 08:57 | 4,435 | 35,310,218 | 12,165,000 | 2,027,000 | 2,396,160 | ||
| 42 | Mar 28, 2026 08:56 | 4,436 | 41,445,124 | 13,182,000 | 1,014,000 | 2,396,160 | ||
| 43 | Mar 28, 2026 08:58 | 4,438 | 38,160,341 | 13,188,000 | 1,014,000 | 2,285,568 | ||
| 44 | Mar 28, 2026 08:54 | 4,439 | 27,798,041 | 13,191,000 | 1,014,000 | 2,510,848 | ||
| 45 | Mar 28, 2026 08:57 | 4,439 | 33,380,533 | 13,190,000 | 1,014,000 | 2,392,064 | ||
| 46 | Mar 28, 2026 08:55 | 4,439 | 30,643,542 | 13,190,000 | 1,014,000 | 2,506,752 | ||
| 47 | Mar 28, 2026 08:57 | 4,441 | 32,618,990 | 14,210,000 | 0 | 2,400,256 | ||
| 48 | Mar 28, 2026 08:57 | 4,442 | 32,664,506 | 12,185,000 | 2,030,000 | 2,285,568 | ||
| 49 | Mar 28, 2026 08:56 | 4,442 | 31,269,449 | 12,183,000 | 2,030,000 | 2,285,568 | ||
| 50 | Mar 28, 2026 08:57 | 4,444 | 31,648,276 | 13,206,000 | 1,015,000 | 2,404,352 | ||
| 51 | Mar 28, 2026 08:56 | 4,444 | 41,613,487 | 13,207,000 | 1,015,000 | 2,400,256 | ||
| 52 | Mar 28, 2026 08:58 | 4,446 | 27,695,158 | 12,195,000 | 2,032,000 | 2,281,472 | ||
| 53 | Mar 28, 2026 08:54 | 4,447 | 35,798,124 | 12,332,000 | 1,897,000 | 2,285,568 | ||
| 54 | Mar 28, 2026 08:53 | 4,450 | 27,765,077 | 12,207,000 | 2,034,000 | 2,506,752 | ||
| 55 | Mar 28, 2026 08:54 | 4,452 | 35,123,109 | 12,210,000 | 2,035,000 | 2,400,256 | ||
| 56 | Mar 28, 2026 08:56 | 4,454 | 32,640,473 | 13,236,000 | 1,018,000 | 2,379,776 | ||
| 57 | Mar 28, 2026 08:56 | 4,473 | 41,842,121 | 13,293,000 | 1,022,000 | 2,285,568 | ||
| 58 | Mar 28, 2026 08:54 | 4,594 | 40,719,776 | 13,651,000 | 1,050,000 | 2,490,368 | ||
| 59 | Mar 28, 2026 08:54 | 4,661 | 29,321,447 | 13,921,000 | 994,000 | 2,285,568 | ||
| 60 | Mar 28, 2026 08:54 | 4,667 | 39,062,258 | 12,942,000 | 1,991,000 | 2,469,888 |