Format integers

Compute a checksum over the decimal representations of binary integers as fast as possible.

Input: 250 000 000 uint32 values in little-endian binary on STDIN (4 bytes each).

Output: A uint64 checksum computed as:

CRC = sum of number_crc(n) for each n

where number_crc(n) converts n to its decimal string and sums ascii(digit) * position over each digit (0-indexed from the left).

Example: For n = 42, the decimal string is "42", so number_crc(42) = ascii('4') * 0 + ascii('2') * 1 = 52 * 0 + 50 * 1 = 50.

Restrictions:60s256Mb 1 Score Packages

Feel free to create an issue if you need an extra library from the standard Ubuntu repository.

Name	Version	Description
libc6-dev	2.39-0ubuntu8.7	GNU C Library: Development Libraries and Header Files Contains the symlinks, headers, and object files needed to compile and link programs which use the standard C library.
libclang-common-14-dev	1:14.0.6-19build4	Clang library - Common development package Clang project is a C, C++, Objective C and Objective C++ front-end based on the LLVM compiler. Its goal is to offer a replacement to the GNU Compiler Collection (GCC). . Clang implements all of the ISO C++ 1998, 11, 14 and 17 standards and also provides most of the support of C++20. . This package contains the Clang generic headers.
libclang-common-15-dev	1:15.0.7-14build3	Clang library - Common development package Clang project is a C, C++, Objective C and Objective C++ front-end based on the LLVM compiler. Its goal is to offer a replacement to the GNU Compiler Collection (GCC). . Clang implements all of the ISO C++ 1998, 11, 14 and 17 standards and also provides most of the support of C++20. . This package contains the Clang generic headers.
libclang-common-16-dev	1:16.0.6-23ubuntu4	Clang library - Common development package Clang project is a C, C++, Objective C and Objective C++ front-end based on the LLVM compiler. Its goal is to offer a replacement to the GNU Compiler Collection (GCC). . Clang implements all of the ISO C++ 1998, 11, 14 and 17 standards and also provides most of the support of C++20. . This package contains the Clang generic headers.
libclang-common-17-dev	1:17.0.6-9ubuntu1	Clang library - Common development package Clang project is a C, C++, Objective C and Objective C++ front-end based on the LLVM compiler. Its goal is to offer a replacement to the GNU Compiler Collection (GCC). . Clang implements all of the ISO C++ 1998, 11, 14 and 17 standards and also provides most of the support of C++20. . This package contains the Clang generic headers.
libclang-common-18-dev	1:18.1.3-1ubuntu1	Clang library - Common development package Clang project is a C, C++, Objective C and Objective C++ front-end based on the LLVM compiler. Its goal is to offer a replacement to the GNU Compiler Collection (GCC). . Clang implements all of the ISO C++ 1998, 11, 14 and 17 standards and also provides most of the support of C++20. . This package contains the Clang generic headers.
libclang-common-19-dev	1:19.1.1-1ubuntu1~24.04.2	Clang library - Common development package Clang project is a C, C++, Objective C and Objective C++ front-end based on the LLVM compiler. Its goal is to offer a replacement to the GNU Compiler Collection (GCC). . Clang implements all of the ISO C++ 1998, 11, 14 and 17 standards and also provides most of the support of C++20. . This package contains the Clang generic headers.
libclang-common-20-dev	1:20.1.2-0ubuntu1~24.04.2	Clang library - Common development package Clang project is a C, C++, Objective C and Objective C++ front-end based on the LLVM compiler. Its goal is to offer a replacement to the GNU Compiler Collection (GCC). . Clang implements all of the ISO C++ 1998, 11, 14 and 17 standards and also provides most of the support of C++20. . This package contains the Clang generic headers.
libcrypt-dev	1:4.4.36-4build1	libcrypt development files This package contains the files needed for developing applications that use libcrypt.
libgcc-10-dev	10.5.0-4ubuntu2.1	GCC support library (development files) This package contains the headers and static library files necessary for building C programs which use libgcc, libgomp, libquadmath, libssp or libitm.
libgcc-11-dev	11.5.0-1ubuntu1~24.04.1	GCC support library (development files) This package contains the headers and static library files necessary for building C programs which use libgcc, libgomp, libquadmath, libssp or libitm.
libgcc-12-dev	12.4.0-2ubuntu1~24.04.1	GCC support library (development files) This package contains the headers and static library files necessary for building C programs which use libgcc, libgomp, libquadmath, libssp or libitm.
libgcc-13-dev	13.3.0-6ubuntu2~24.04.1	GCC support library (development files) This package contains the headers and static library files necessary for building C programs which use libgcc, libgomp, libquadmath, libssp or libitm.
libgcc-14-dev	14.2.0-4ubuntu2~24.04.1	GCC support library (development files) This package contains the headers and static library files necessary for building C programs which use libgcc, libgomp, libquadmath, libssp or libitm.
libobjc-13-dev	13.3.0-6ubuntu2~24.04.1	Runtime library for GNU Objective-C applications (development files) This package contains the headers and static library files needed to build GNU ObjC applications.
libssl-dev	3.0.13-0ubuntu3.9	Secure Sockets Layer toolkit - development files This package is part of the OpenSSL project's implementation of the SSL and TLS cryptographic protocols for secure communication over the Internet. . It contains development libraries, header files, and manpages for libssl and libcrypto.
libstdc++-10-dev	10.5.0-4ubuntu2.1	GNU Standard C++ Library v3 (development files) This package contains the headers and static library files necessary for building C++ programs which use libstdc++. . libstdc++-v3 is a complete rewrite from the previous libstdc++-v2, which was included up to g++-2.95. The first version of libstdc++-v3 appeared in g++-3.0.
libstdc++-11-dev	11.5.0-1ubuntu1~24.04.1	GNU Standard C++ Library v3 (development files) This package contains the headers and static library files necessary for building C++ programs which use libstdc++. . libstdc++-v3 is a complete rewrite from the previous libstdc++-v2, which was included up to g++-2.95. The first version of libstdc++-v3 appeared in g++-3.0.
libstdc++-12-dev	12.4.0-2ubuntu1~24.04.1	GNU Standard C++ Library v3 (development files) This package contains the headers and static library files necessary for building C++ programs which use libstdc++. . libstdc++-v3 is a complete rewrite from the previous libstdc++-v2, which was included up to g++-2.95. The first version of libstdc++-v3 appeared in g++-3.0.
libstdc++-13-dev	13.3.0-6ubuntu2~24.04.1	GNU Standard C++ Library v3 (development files) This package contains the headers and static library files necessary for building C++ programs which use libstdc++. . libstdc++-v3 is a complete rewrite from the previous libstdc++-v2, which was included up to g++-2.95. The first version of libstdc++-v3 appeared in g++-3.0.
libstdc++-14-dev	14.2.0-4ubuntu2~24.04.1	GNU Standard C++ Library v3 (development files) This package contains the headers and static library files necessary for building C++ programs which use libstdc++. . libstdc++-v3 is a complete rewrite from the previous libstdc++-v2, which was included up to g++-2.95. The first version of libstdc++-v3 appeared in g++-3.0.
libtbb-dev	2021.11.0-2ubuntu2	parallelism library for C++ - development files TBB is a library that helps you leverage multi-core processor performance without having to be a threading expert. It represents a higher-level, task-based parallelism that abstracts platform details and threading mechanism for performance and scalability. . (Note: if you are a user of the i386 architecture, i.e., 32-bit Intel or compatible hardware, this package only supports Pentium4-compatible and higher processors.) . This package includes the TBB development files.

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Dominique GarmierScore: 153,032Success

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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory
1	Mar 19, 2026 22:22	151,847	770,368,047	743,051,000	1,000,000	2,273,280
2	Mar 16, 2026 15:46	151,911	775,048,533	742,365,000	1,998,000	2,273,280
3	Mar 19, 2026 22:15	151,916	768,993,744	744,387,000	0	2,273,280
4	Mar 20, 2026 02:04	151,934	768,360,616	743,480,000	999,000	2,265,088
5	Mar 16, 2026 15:47	152,108	772,676,178	744,330,000	999,000	2,469,888
6	Mar 19, 2026 19:17	152,170	775,899,747	743,632,000	1,999,000	2,269,184
7	Mar 16, 2026 15:40	152,176	769,603,250	743,661,000	1,999,000	2,273,280
8	Mar 16, 2026 15:47	152,206	775,873,012	744,811,000	999,000	2,265,088
9	Mar 16, 2026 15:46	152,223	772,153,217	744,894,000	999,000	2,265,088
10	Mar 16, 2026 15:40	152,226	772,164,632	743,908,000	1,999,000	2,465,792
11	Mar 16, 2026 15:47	152,316	774,754,675	744,351,000	1,998,000	2,265,088
12	Mar 16, 2026 15:47	152,335	777,375,847	744,445,000	1,998,000	2,473,984
13	Mar 19, 2026 11:05	152,530	778,083,687	746,400,000	999,000	2,273,280
14	Mar 20, 2026 02:04	152,567	778,789,055	746,577,000	999,000	2,461,696
15	Mar 21, 2026 01:00	152,605	771,186,719	745,767,000	1,996,000	2,273,280
16	Mar 16, 2026 15:47	152,638	773,739,843	746,929,000	999,000	2,457,600
17	Mar 16, 2026 15:39	152,746	778,947,002	746,457,000	1,998,000	2,273,280
18	Mar 20, 2026 03:04	152,756	774,378,163	747,506,000	999,000	2,273,280
19	Mar 16, 2026 15:39	152,940	779,246,331	747,408,000	1,998,000	2,465,792
20	Mar 19, 2026 22:15	152,979	776,950,141	747,598,000	1,998,000	2,265,088
21	Mar 20, 2026 02:04	152,996	777,939,799	748,683,000	999,000	2,469,888
22	Mar 21, 2026 01:00	153,013	775,694,867	747,767,000	1,999,000	2,461,696
23	Mar 16, 2026 15:46	153,032	777,717,955	748,859,000	999,000	2,469,888
24	Mar 19, 2026 19:17	153,101	776,730,922	748,199,000	1,997,000	2,465,792
25	Mar 16, 2026 15:46	153,123	774,176,783	749,303,000	999,000	2,527,232
26	Mar 19, 2026 22:22	153,134	777,017,074	749,356,000	999,000	2,326,528
27	Mar 16, 2026 15:46	153,211	776,819,159	748,737,000	1,999,000	2,265,088
28	Mar 19, 2026 11:30	153,299	777,942,049	749,169,000	1,997,000	2,273,280
29	Mar 19, 2026 11:05	153,477	779,036,889	751,037,000	1,000,000	2,473,984
30	Mar 16, 2026 15:47	153,648	779,415,708	750,874,000	1,999,000	2,273,280
31	Mar 16, 2026 15:47	153,697	784,095,917	753,113,000	0	2,273,280
32	Mar 16, 2026 15:39	153,701	777,690,943	752,134,000	1,000,000	2,265,088
33	Mar 19, 2026 22:15	153,711	779,282,549	753,186,000	0	2,461,696
34	Mar 19, 2026 11:30	153,728	784,454,433	751,269,000	1,998,000	2,469,888
35	Mar 19, 2026 11:30	153,745	781,854,538	751,352,000	1,998,000	2,273,280
36	Mar 16, 2026 15:47	153,796	782,522,068	751,600,000	1,998,000	2,273,280
37	Mar 16, 2026 15:40	153,901	782,867,399	753,115,000	1,000,000	2,461,696
38	Mar 20, 2026 03:04	154,229	785,154,071	753,721,000	1,999,000	2,265,088
39	Mar 20, 2026 03:04	154,352	785,391,362	755,328,000	999,000	2,273,280
40	Mar 19, 2026 19:17	154,478	788,323,958	755,942,000	999,000	2,265,088
41	Mar 19, 2026 22:22	154,759	785,988,583	756,322,000	1,998,000	2,265,088
42	Mar 19, 2026 11:05	155,185	792,575,208	759,406,000	999,000	2,326,528
43	Mar 16, 2026 15:46	155,283	788,127,695	758,888,000	1,999,000	2,265,088
44	Mar 21, 2026 01:00	155,383	788,404,048	759,381,000	1,998,000	2,469,888
45	Mar 16, 2026 15:47	156,013	794,557,816	763,467,000	999,000	2,265,088

Model	Intel(R) Xeon(R) CPU E3-1271 v3 @ 3.60GHz
Cores	1