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 05:19	52,205	317,717,391	255,804,529	0	2,359,296
2	Jun 15, 2024 05:18	52,208	325,659,215	255,819,048	0	2,232,320
3	Jun 15, 2024 05:19	52,217	328,851,331	255,863,563	0	2,240,512
4	Jun 15, 2024 05:18	52,219	317,697,206	255,875,463	0	2,248,704
5	Jun 15, 2024 05:18	52,267	332,952,316	256,110,141	0	2,244,608
6	Jun 15, 2024 05:19	52,740	316,825,977	258,427,093	0	2,244,608
7	Jun 15, 2024 05:19	52,936	281,909,960	257,382,000	2,002,000	2,281,472
8	Jun 15, 2024 05:19	52,937	281,977,148	258,391,000	1,001,000	2,506,752
9	Jun 15, 2024 05:18	52,941	282,589,055	257,410,000	2,003,000	2,289,664
10	Jun 15, 2024 05:18	52,943	285,057,321	258,422,000	1,001,000	2,486,272
11	Jun 15, 2024 05:19	52,951	286,951,825	257,455,000	2,003,000	2,289,664
12	Jun 15, 2024 05:18	52,952	288,001,736	257,462,000	2,003,000	2,281,472
13	Jun 15, 2024 05:19	52,953	290,873,318	257,467,000	2,003,000	2,490,368
14	Jun 15, 2024 05:18	52,963	286,080,271	257,517,000	2,004,000	2,494,464
15	Jun 15, 2024 05:18	52,963	287,087,344	257,515,000	2,004,000	2,281,472
16	Jun 15, 2024 05:18	52,964	284,654,145	256,531,000	2,994,000	2,281,472
17	Jun 15, 2024 05:18	52,966	291,615,757	256,539,000	2,994,000	2,289,664
18	Jun 15, 2024 05:18	52,967	286,348,192	256,544,000	2,994,000	2,289,664
19	Jun 15, 2024 05:18	52,975	285,587,072	257,583,000	1,996,000	2,502,656
20	Jun 15, 2024 05:18	53,017	285,245,888	256,785,000	2,997,000	2,289,664
21	Jun 15, 2024 05:19	53,030	282,377,168	256,851,000	2,998,000	2,486,272
22	Jun 15, 2024 05:19	53,046	282,492,108	256,926,000	2,999,000	2,285,568
23	Jun 15, 2024 05:18	53,066	281,810,842	257,021,000	3,000,000	2,494,464
24	Jun 15, 2024 05:18	53,074	283,641,625	258,064,000	2,000,000	2,289,664
25	Jun 15, 2024 05:18	53,484	334,443,478	262,073,810	0	2,240,512
26	Jun 15, 2024 05:19	53,864	289,874,671	261,937,000	1,999,000	2,289,664
27	Jun 15, 2024 05:18	53,867	287,230,534	261,947,000	1,999,000	2,506,752
28	Jun 15, 2024 05:19	54,023	290,643,193	261,719,000	2,996,000	2,498,560
29	Jun 15, 2024 05:18	54,341	288,381,551	263,269,000	3,003,000	2,281,472
30	Jun 15, 2024 05:18	54,380	323,791,386	266,461,617	0	2,252,800
31	Jun 15, 2024 05:18	54,477	296,832,809	263,938,000	2,999,000	2,289,664
32	Jun 15, 2024 05:18	54,950	295,968,712	266,254,000	3,002,000	2,514,944
33	Jun 15, 2024 05:18	54,975	334,042,105	269,379,887	0	2,240,512
34	Jun 15, 2024 05:18	54,989	299,593,756	267,443,000	2,003,000	2,289,664
35	Jun 15, 2024 05:18	55,168	295,831,447	269,323,000	1,001,000	2,498,560
36	Jun 15, 2024 05:19	55,510	298,989,814	268,999,000	2,999,000	2,281,472

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