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 15, 2024 05:43	52,709	325,628,550	258,274,579	0	2,232,320
2	Jun 15, 2024 05:43	52,722	325,481,351	258,336,605	0	2,236,416
3	Jun 15, 2024 05:43	52,727	323,276,297	258,361,707	0	2,375,680
4	Jun 15, 2024 05:43	52,826	325,822,305	258,845,678	0	2,244,608
5	Jun 15, 2024 05:43	52,886	321,904,273	259,140,687	0	2,236,416
6	Jun 15, 2024 05:43	53,154	328,639,593	260,455,874	0	2,228,224
7	Jun 15, 2024 05:43	53,227	329,720,118	260,813,896	0	2,236,416
8	Jun 15, 2024 05:43	53,514	281,931,814	259,215,000	3,002,000	2,281,472
9	Jun 15, 2024 05:43	53,516	289,744,385	259,228,000	3,002,000	2,289,664
10	Jun 15, 2024 05:43	53,518	287,351,972	260,236,000	2,001,000	2,281,472
11	Jun 15, 2024 05:43	53,519	286,893,526	259,240,000	3,002,000	2,498,560
12	Jun 15, 2024 05:43	53,519	289,775,190	259,241,000	3,002,000	2,281,472
13	Jun 15, 2024 05:43	53,519	285,517,476	260,244,000	2,001,000	2,494,464
14	Jun 15, 2024 05:43	53,520	288,737,412	261,247,000	1,000,000	2,281,472
15	Jun 15, 2024 05:43	53,520	291,042,653	259,244,000	3,002,000	2,289,664
16	Jun 15, 2024 05:43	53,525	288,128,807	260,272,000	2,002,000	2,519,040
17	Jun 15, 2024 05:43	53,534	284,918,868	260,315,000	2,002,000	2,293,760
18	Jun 15, 2024 05:43	53,539	290,490,227	260,337,000	2,002,000	2,289,664
19	Jun 15, 2024 05:43	53,542	290,250,151	259,354,000	3,004,000	2,281,472
20	Jun 15, 2024 05:43	53,591	289,580,333	260,600,000	1,996,000	2,519,040
21	Jun 15, 2024 05:43	53,608	288,104,874	260,682,000	1,997,000	2,490,368
22	Jun 15, 2024 05:43	53,609	289,118,847	261,688,000	998,000	2,502,656
23	Jun 15, 2024 05:43	53,611	287,078,377	260,699,000	1,997,000	2,490,368
24	Jun 15, 2024 05:43	53,649	289,989,393	259,881,000	2,998,000	2,490,368
25	Jun 15, 2024 05:43	53,870	290,397,472	260,964,000	2,999,000	2,494,464
26	Jun 15, 2024 05:43	53,873	288,510,153	260,981,000	2,999,000	2,494,464
27	Jun 15, 2024 05:43	53,889	284,490,894	261,054,000	3,000,000	2,289,664
28	Jun 15, 2024 05:43	54,009	292,436,279	261,650,000	2,995,000	2,289,664
29	Jun 15, 2024 05:43	54,020	289,397,636	261,704,000	2,996,000	2,351,104
30	Jun 15, 2024 05:43	54,237	287,338,615	262,766,000	2,997,000	2,347,008
31	Jun 15, 2024 05:43	54,256	289,967,800	262,854,000	2,998,000	2,494,464
32	Jun 15, 2024 05:43	54,567	328,684,029	267,379,902	0	2,240,512
33	Jun 15, 2024 05:43	54,770	292,591,929	267,371,000	1,001,000	2,281,472
34	Jun 15, 2024 05:43	55,041	293,176,387	267,706,000	1,997,000	2,486,272
35	Jun 15, 2024 05:43	55,153	295,321,563	268,250,000	2,001,000	2,285,568
36	Jun 15, 2024 05:43	55,361	342,401,434	271,267,659	0	2,228,224

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