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 12, 2024 08:15	60,457	320,278,868	294,236,000	2,001,000	2,420,736
2	Jun 12, 2024 08:14	60,458	323,279,887	296,246,000	0	2,420,736
3	Jun 12, 2024 08:17	60,486	322,418,248	294,381,000	2,002,000	2,293,760
4	Jun 12, 2024 08:14	60,487	323,051,298	294,384,000	2,002,000	2,293,760
5	Jun 12, 2024 08:17	60,669	325,432,554	296,280,000	1,000,000	2,424,832
6	Jun 12, 2024 08:14	61,024	321,785,052	296,017,000	3,000,000	2,506,752
7	Jun 12, 2024 08:17	61,230	320,894,250	297,027,000	3,000,000	2,293,760
8	Jun 12, 2024 08:14	61,232	326,032,229	297,036,000	3,000,000	2,424,832
9	Jun 12, 2024 08:14	61,247	328,215,696	297,111,000	3,001,000	2,428,928
10	Jun 12, 2024 08:15	61,248	322,521,073	297,115,000	3,001,000	2,412,544
11	Jun 12, 2024 08:17	61,259	325,232,262	299,168,000	1,000,000	2,433,024
12	Jun 12, 2024 08:17	61,261	329,154,730	297,177,000	3,001,000	2,437,120
13	Jun 12, 2024 08:15	61,262	323,326,358	297,182,000	3,001,000	2,420,736
14	Jun 12, 2024 08:14	61,262	321,388,990	299,183,000	1,000,000	2,420,736
15	Jun 12, 2024 08:17	61,288	366,768,412	300,310,222	0	2,281,472
16	Jun 12, 2024 08:15	61,294	365,454,715	300,341,293	0	2,281,472
17	Jun 12, 2024 08:15	61,300	376,045,795	300,371,421	0	2,277,376
18	Jun 12, 2024 08:17	61,332	356,065,867	300,525,506	0	2,277,376
19	Jun 12, 2024 08:14	61,339	366,117,303	300,561,993	0	2,285,568
20	Jun 12, 2024 08:17	61,481	368,403,987	301,258,343	0	2,285,568
21	Jun 12, 2024 08:17	61,596	325,112,773	298,824,000	2,998,000	2,510,848
22	Jun 12, 2024 08:15	62,032	326,890,344	300,956,000	2,999,000	2,293,760
23	Jun 12, 2024 08:17	62,043	326,169,376	303,009,000	1,000,000	2,293,760
24	Jun 12, 2024 08:15	62,141	361,364,611	304,490,667	0	2,285,568
25	Jun 12, 2024 08:14	62,150	366,230,445	304,533,316	0	2,285,568
26	Jun 12, 2024 08:15	62,221	333,127,115	301,887,000	2,998,000	2,293,760
27	Jun 12, 2024 08:15	62,245	329,043,924	302,002,000	3,000,000	2,293,760
28	Jun 12, 2024 08:15	62,250	328,415,649	304,027,000	1,000,000	2,420,736
29	Jun 12, 2024 08:14	62,254	331,309,723	302,045,000	3,000,000	2,408,448
30	Jun 12, 2024 08:17	62,258	327,825,282	302,062,000	3,000,000	2,424,832
31	Jun 12, 2024 08:14	62,339	372,696,476	305,458,843	0	2,273,280
32	Jun 12, 2024 08:15	62,394	331,363,450	302,732,000	2,997,000	2,293,760
33	Jun 12, 2024 08:15	64,520	342,975,639	313,147,000	3,001,000	2,416,640
34	Jun 12, 2024 08:17	66,666	357,667,621	323,669,000	2,996,000	2,293,760
35	Jun 12, 2024 08:14	67,078	361,123,767	325,687,000	2,997,000	2,265,088
36	Jun 12, 2024 08:14	69,290	367,306,740	337,519,000	2,003,000	2,293,760

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