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 06:08	54,424	296,007,949	263,684,000	2,996,000	2,293,760
2	Jun 14, 2024 06:08	54,425	294,943,101	264,684,000	1,997,000	2,482,176
3	Jun 14, 2024 06:08	54,427	300,704,578	263,695,000	2,996,000	2,433,024
4	Jun 14, 2024 06:09	54,435	289,745,982	263,734,000	2,996,000	2,420,736
5	Jun 14, 2024 06:09	54,440	290,617,344	263,760,000	2,997,000	2,420,736
6	Jun 14, 2024 06:08	54,451	291,720,793	264,814,000	1,998,000	2,289,664
7	Jun 14, 2024 06:09	54,455	294,049,901	263,831,000	2,998,000	2,416,640
8	Jun 14, 2024 06:08	54,469	290,997,557	263,899,000	2,998,000	2,428,928
9	Jun 14, 2024 06:08	54,484	290,002,268	263,975,000	2,999,000	2,293,760
10	Jun 14, 2024 06:08	54,718	293,238,588	265,117,000	3,001,000	2,293,760
11	Jun 14, 2024 06:08	54,721	296,140,123	267,131,000	1,000,000	2,293,760
12	Jun 14, 2024 06:08	54,731	287,374,455	266,181,000	2,001,000	2,416,640
13	Jun 14, 2024 06:09	54,749	289,741,888	266,270,000	2,002,000	2,420,736
14	Jun 14, 2024 06:08	54,759	291,650,465	267,319,000	1,001,000	2,424,832
15	Jun 14, 2024 06:09	54,777	297,385,809	266,404,000	2,003,000	2,437,120
16	Jun 14, 2024 06:08	54,777	290,842,338	266,402,000	2,003,000	2,416,640
17	Jun 14, 2024 06:09	54,786	296,130,275	266,447,000	2,003,000	2,416,640
18	Jun 14, 2024 06:08	54,793	299,369,707	266,484,000	2,003,000	2,293,760
19	Jun 14, 2024 06:09	54,821	296,787,077	266,624,000	1,997,000	2,424,832
20	Jun 14, 2024 06:08	54,825	295,547,369	265,647,000	2,996,000	2,293,760
21	Jun 14, 2024 06:08	54,843	298,928,369	265,734,000	2,997,000	2,293,760
22	Jun 14, 2024 06:08	54,847	295,705,674	265,751,000	2,997,000	2,293,760
23	Jun 14, 2024 06:09	54,852	299,304,878	265,776,000	2,997,000	2,293,760
24	Jun 14, 2024 06:09	55,534	338,903,547	272,114,722	0	2,289,664
25	Jun 14, 2024 06:09	55,554	333,064,586	272,213,835	0	2,273,280
26	Jun 14, 2024 06:08	55,556	339,039,936	272,223,229	0	2,277,376
27	Jun 14, 2024 06:09	55,565	345,088,854	272,266,892	0	2,277,376
28	Jun 14, 2024 06:08	55,642	347,890,597	272,647,756	0	2,281,472
29	Jun 14, 2024 06:08	55,682	335,275,204	272,844,009	0	2,281,472
30	Jun 14, 2024 06:08	55,701	296,426,002	269,938,000	2,999,000	2,293,760
31	Jun 14, 2024 06:08	56,082	355,373,495	274,800,547	0	2,260,992
32	Jun 14, 2024 06:08	56,107	350,857,437	274,923,574	0	2,277,376
33	Jun 14, 2024 06:08	56,158	306,559,602	272,172,000	3,001,000	2,293,760
34	Jun 14, 2024 06:08	57,149	373,133,874	280,030,873	0	2,281,472
35	Jun 14, 2024 06:09	60,159	317,605,749	291,783,000	2,997,000	2,416,640
36	Jun 14, 2024 06:08	68,047	366,055,619	330,435,000	2,994,000	2,293,760

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