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	Jun 14, 2024 13:11	54,072	326,377,397	264,952,061	0	2,277,376
2	Jun 14, 2024 13:45	54,124	331,135,273	265,207,426	0	2,273,280
3	Jun 14, 2024 13:11	54,127	326,148,687	265,224,438	0	2,273,280
4	Jun 14, 2024 13:45	54,131	335,264,779	265,242,655	0	2,281,472
5	Jun 14, 2024 13:12	54,140	334,132,904	265,285,388	0	2,281,472
6	Jun 14, 2024 13:12	54,206	328,598,592	265,609,606	0	2,281,472
7	Jun 14, 2024 13:45	54,836	296,690,652	265,698,000	2,996,000	2,416,640
8	Jun 14, 2024 13:12	54,928	295,831,015	267,144,000	2,001,000	2,293,760
9	Jun 14, 2024 13:45	54,947	292,673,845	266,236,000	3,002,000	2,416,640
10	Jun 14, 2024 13:45	54,971	293,439,640	268,356,000	1,001,000	2,293,760
11	Jun 14, 2024 13:11	54,974	292,821,412	267,373,000	2,002,000	2,293,760
12	Jun 14, 2024 13:12	54,977	298,966,379	267,387,000	2,002,000	2,293,760
13	Jun 14, 2024 13:12	54,981	299,324,702	268,408,000	1,001,000	2,420,736
14	Jun 14, 2024 13:45	54,995	296,021,573	267,472,000	2,003,000	2,424,832
15	Jun 14, 2024 13:45	54,998	298,997,363	267,489,000	2,003,000	2,293,760
16	Jun 14, 2024 13:11	55,004	300,099,233	267,518,000	2,003,000	2,293,760
17	Jun 14, 2024 13:11	55,035	333,936,965	269,671,820	0	2,277,376
18	Jun 14, 2024 13:12	55,120	291,115,295	267,089,000	3,001,000	2,293,760
19	Jun 14, 2024 13:11	55,199	302,542,074	268,473,000	2,003,000	2,412,544
20	Jun 14, 2024 13:11	55,212	297,572,435	268,536,000	2,004,000	2,293,760
21	Jun 14, 2024 13:12	55,311	298,581,120	268,024,000	3,000,000	2,293,760
22	Jun 14, 2024 13:11	55,312	291,963,480	268,030,000	3,000,000	2,420,736
23	Jun 14, 2024 13:11	55,317	292,534,396	269,052,000	2,000,000	2,424,832
24	Jun 14, 2024 13:12	55,319	300,019,032	268,061,000	3,000,000	2,293,760
25	Jun 14, 2024 13:11	55,325	295,678,744	268,091,000	3,001,000	2,293,760
26	Jun 14, 2024 13:45	55,330	293,471,794	269,118,000	2,000,000	2,293,760
27	Jun 14, 2024 13:11	55,356	294,783,107	268,242,000	3,002,000	2,293,760
28	Jun 14, 2024 13:11	55,370	298,122,698	269,313,000	2,002,000	2,416,640
29	Jun 14, 2024 13:45	55,384	292,025,483	270,379,000	1,001,000	2,293,760
30	Jun 14, 2024 13:12	55,386	298,181,101	269,389,000	2,002,000	2,293,760
31	Jun 14, 2024 13:12	55,442	296,467,809	268,672,000	2,996,000	2,293,760
32	Jun 14, 2024 13:45	55,569	333,053,775	272,288,183	0	2,273,280
33	Jun 14, 2024 13:45	55,947	301,000,508	272,141,000	2,001,000	2,293,760
34	Jun 14, 2024 13:12	56,720	344,552,031	277,928,980	0	2,277,376
35	Jun 14, 2024 13:12	65,615	356,142,867	320,511,000	1,001,000	2,293,760
36	Jun 14, 2024 13:45	70,072	365,457,674	342,353,000	1,001,000	2,293,760

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