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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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory
1	Apr 27, 2024 15:07	56,403	342,483,355	276,376,303	0	2,277,376
2	Apr 27, 2024 15:07	56,429	348,316,473	276,499,931	0	2,277,376
3	Apr 27, 2024 15:07	56,485	340,531,364	276,775,922	0	2,285,568
4	Apr 27, 2024 15:08	56,487	338,798,335	276,784,578	0	2,269,184
5	Apr 27, 2024 15:07	56,543	343,847,482	277,062,417	0	2,281,472
6	Apr 27, 2024 15:08	56,604	334,431,600	277,359,692	0	2,281,472
7	Apr 27, 2024 15:08	56,736	341,422,183	278,007,518	0	2,277,376
8	Apr 27, 2024 15:08	57,910	311,185,603	281,759,000	1,998,000	2,289,664
9	Apr 27, 2024 15:07	57,951	305,774,357	281,963,000	1,999,000	2,367,488
10	Apr 27, 2024 15:08	57,971	311,846,973	283,058,000	1,000,000	2,269,184
11	Apr 27, 2024 15:07	57,987	306,485,616	281,133,000	3,001,000	2,527,232
12	Apr 27, 2024 15:08	58,007	312,187,025	281,234,000	3,002,000	2,289,664
13	Apr 27, 2024 15:07	58,010	306,122,241	284,251,000	0	2,269,184
14	Apr 27, 2024 15:07	58,023	314,805,089	282,313,000	2,002,000	2,273,280
15	Apr 27, 2024 15:07	58,025	307,637,275	282,321,000	2,002,000	2,289,664
16	Apr 27, 2024 15:07	58,044	316,231,043	282,414,000	2,002,000	2,289,664
17	Apr 27, 2024 15:07	58,048	313,156,983	282,430,000	2,003,000	2,265,088
18	Apr 27, 2024 15:08	58,053	317,101,801	282,455,000	2,003,000	2,289,664
19	Apr 27, 2024 15:07	58,090	311,741,757	281,644,000	2,996,000	2,523,136
20	Apr 27, 2024 15:07	58,090	314,743,671	282,643,000	1,997,000	2,289,664
21	Apr 27, 2024 15:08	58,098	313,301,404	282,684,000	1,997,000	2,289,664
22	Apr 27, 2024 15:07	58,099	312,082,403	281,688,000	2,996,000	2,289,664
23	Apr 27, 2024 15:07	58,113	307,083,537	281,756,000	2,997,000	2,523,136
24	Apr 27, 2024 15:07	58,114	306,609,590	281,760,000	2,997,000	2,289,664
25	Apr 27, 2024 15:07	58,129	306,751,184	281,833,000	2,998,000	2,265,088
26	Apr 27, 2024 15:07	58,136	309,811,655	281,868,000	2,998,000	2,273,280
27	Apr 27, 2024 15:07	58,159	310,117,942	282,979,000	1,999,000	2,265,088
28	Apr 27, 2024 15:07	58,200	309,105,507	282,180,000	3,001,000	2,289,664
29	Apr 27, 2024 15:07	58,288	310,724,543	282,615,000	2,995,000	2,289,664
30	Apr 27, 2024 15:08	58,307	309,445,778	283,705,000	1,997,000	2,281,472
31	Apr 27, 2024 15:07	58,459	350,650,117	286,448,860	0	2,277,376
32	Apr 27, 2024 15:08	58,830	311,769,853	286,267,000	2,001,000	2,289,664
33	Apr 27, 2024 15:07	58,985	320,581,754	286,027,000	3,000,000	2,273,280
34	Apr 27, 2024 15:08	59,963	317,290,121	291,823,000	1,998,000	2,289,664
35	Apr 27, 2024 15:08	60,056	320,672,810	292,274,000	2,001,000	2,523,136
36	Apr 27, 2024 15:07	60,490	363,654,374	296,399,686	0	2,273,280

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