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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Robert BurkeScore: 61,516Success

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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory
1	Oct 4, 2022 09:22	59,409	358,240,102	291,103,499	0	2,187,264
2	Oct 4, 2022 09:22	59,413	352,904,988	291,126,098	0	2,187,264
3	Oct 4, 2022 09:22	59,415	353,822,941	291,132,367	0	2,174,976
4	Oct 4, 2022 09:12	59,444	368,979,604	291,275,968	0	2,183,168
5	Aug 1, 2022 09:46	59,472	355,084,865	291,414,619	0	2,174,976
6	Aug 1, 2022 09:46	59,479	359,144,198	291,445,127	0	2,179,072
7	Oct 4, 2022 09:12	59,483	351,319,328	291,467,169	0	2,183,168
8	Aug 1, 2022 09:46	59,484	361,401,355	291,472,467	0	2,187,264
9	Oct 4, 2022 09:12	59,491	360,498,932	291,507,327	0	2,301,952
10	Oct 4, 2022 09:22	61,453	332,662,040	300,118,000	1,000,000	2,281,472
11	Oct 4, 2022 09:12	61,492	324,067,886	300,310,000	1,001,000	2,441,216
12	Aug 1, 2022 09:46	61,493	330,536,235	300,313,000	1,001,000	2,281,472
13	Oct 4, 2022 09:22	61,494	329,035,670	300,321,000	1,001,000	2,445,312
14	Oct 4, 2022 09:12	61,495	323,611,193	300,324,000	1,001,000	2,281,472
15	Oct 4, 2022 09:22	61,504	322,960,284	300,370,000	1,001,000	2,281,472
16	Oct 4, 2022 09:22	61,507	329,263,812	300,385,000	1,001,000	2,281,472
17	Aug 1, 2022 09:46	61,509	321,151,190	299,398,000	1,995,000	2,281,472
18	Oct 4, 2022 09:22	61,512	326,745,563	300,410,000	1,001,000	2,445,312
19	Aug 1, 2022 09:46	61,516	329,333,674	300,428,000	1,001,000	2,441,216
20	Oct 4, 2022 09:22	61,519	327,468,199	300,442,000	1,001,000	2,445,312
21	Oct 4, 2022 09:12	61,519	330,464,702	300,443,000	1,001,000	2,281,472
22	Oct 4, 2022 09:12	61,521	327,895,341	299,455,000	1,996,000	2,441,216
23	Oct 4, 2022 09:12	61,526	323,395,919	299,481,000	1,996,000	2,445,312
24	Oct 4, 2022 09:12	61,531	334,243,042	300,503,000	998,000	2,281,472
25	Aug 1, 2022 09:46	61,541	323,222,394	299,552,000	1,997,000	2,441,216
26	Aug 1, 2022 09:46	61,554	323,976,663	299,617,000	1,997,000	2,441,216
27	Oct 4, 2022 09:22	61,557	330,028,360	300,630,000	998,000	2,441,216
28	Oct 4, 2022 09:12	61,560	325,373,221	299,646,000	1,997,000	2,449,408
29	Aug 1, 2022 09:46	61,574	331,823,765	299,717,000	1,998,000	2,445,312
30	Oct 4, 2022 09:12	61,586	330,620,540	299,773,000	1,998,000	2,281,472
31	Oct 4, 2022 09:12	61,603	327,382,651	299,856,000	1,999,000	2,281,472
32	Oct 4, 2022 09:22	61,668	324,262,941	301,174,000	1,000,000	2,281,472
33	Aug 1, 2022 09:46	61,757	329,412,009	299,615,000	2,996,000	2,281,472
34	Oct 4, 2022 09:22	61,764	330,461,875	300,648,000	1,997,000	2,449,408
35	Aug 1, 2022 09:46	61,981	325,444,461	302,707,000	1,002,000	2,281,472
36	Aug 1, 2022 09:46	62,512	327,992,404	305,307,000	1,001,000	2,457,600

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