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 07:20	60,953	326,985,339	295,676,000	2,996,000	2,285,568
2	Jun 12, 2024 07:20	60,953	324,269,403	296,675,000	1,997,000	2,310,144
3	Jun 12, 2024 07:20	61,017	320,210,108	297,984,000	999,000	2,301,952
4	Jun 12, 2024 07:20	61,028	322,844,677	297,037,000	2,000,000	2,285,568
5	Jun 12, 2024 07:20	61,199	323,030,976	296,878,000	2,998,000	2,306,048
6	Jun 12, 2024 07:19	61,233	325,829,361	299,042,000	1,000,000	2,310,144
7	Jun 12, 2024 07:19	61,251	322,160,605	298,132,000	2,000,000	2,285,568
8	Jun 12, 2024 07:20	61,278	323,332,625	297,258,000	3,002,000	2,285,568
9	Jun 12, 2024 07:20	61,294	321,351,683	298,341,000	2,002,000	2,412,544
10	Jun 12, 2024 07:20	61,363	322,352,659	297,681,000	2,996,000	2,285,568
11	Jun 12, 2024 07:20	61,390	324,487,999	298,811,000	1,998,000	2,322,432
12	Jun 12, 2024 07:20	61,390	333,006,740	297,815,000	2,998,000	2,322,432
13	Jun 12, 2024 07:19	61,413	322,030,385	298,927,000	1,999,000	2,314,240
14	Jun 12, 2024 07:20	61,426	325,567,257	297,990,000	2,999,000	2,285,568
15	Jun 12, 2024 07:20	61,647	325,523,500	299,069,000	3,000,000	2,301,952
16	Jun 12, 2024 07:19	61,943	368,523,188	303,520,222	0	2,269,184
17	Jun 12, 2024 07:19	61,975	378,814,819	303,678,356	0	2,277,376
18	Jun 12, 2024 07:20	62,008	367,551,114	303,840,662	0	2,273,280
19	Jun 12, 2024 07:20	62,024	370,082,532	303,919,778	0	2,285,568
20	Jun 12, 2024 07:20	62,070	363,892,444	304,141,742	0	2,269,184
21	Jun 12, 2024 07:20	62,100	390,441,524	304,291,733	0	2,269,184
22	Jun 12, 2024 07:20	62,572	331,488,911	305,604,000	998,000	2,285,568
23	Jun 12, 2024 07:20	62,826	380,323,361	307,849,615	0	2,269,184
24	Jun 12, 2024 07:19	62,882	333,006,698	305,122,000	3,001,000	2,285,568
25	Jun 12, 2024 07:19	63,270	337,850,346	307,024,000	3,000,000	2,285,568
26	Jun 12, 2024 07:20	63,390	378,584,563	310,609,857	0	2,273,280
27	Jun 12, 2024 07:20	63,559	338,280,916	309,436,000	2,002,000	2,301,952
28	Jun 12, 2024 07:20	64,009	339,798,017	311,640,000	2,004,000	2,285,568
29	Jun 12, 2024 07:19	64,050	376,649,014	313,846,074	0	2,273,280
30	Jun 12, 2024 07:19	64,206	342,450,210	311,613,000	2,996,000	2,297,856
31	Jun 12, 2024 07:20	64,774	347,576,362	315,392,000	2,002,000	2,301,952
32	Jun 12, 2024 07:20	65,665	346,282,807	319,760,000	1,998,000	2,322,432
33	Jun 12, 2024 07:20	66,090	347,756,704	320,842,000	2,998,000	2,285,568
34	Jun 12, 2024 07:19	71,809	372,671,985	348,868,000	2,998,000	2,301,952
35	Jun 12, 2024 07:19	74,345	387,307,250	363,292,000	1,000,000	2,285,568
36	Jun 12, 2024 07:19	97,472	505,568,350	475,615,000	1,998,000	2,301,952

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