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	Oct 3, 2022 04:24	60,185	319,164,846	293,908,000	999,000	2,281,472
2	Oct 3, 2022 04:02	60,210	319,322,275	293,028,000	2,000,000	2,281,472
3	Oct 3, 2022 04:02	60,216	315,773,141	293,058,000	2,000,000	2,400,256
4	Oct 3, 2022 04:24	60,216	320,166,948	293,058,000	2,000,000	2,281,472
5	Oct 3, 2022 04:24	60,220	326,066,845	293,077,000	2,000,000	2,281,472
6	Oct 3, 2022 04:02	60,227	316,997,310	294,110,000	1,000,000	2,400,256
7	Oct 3, 2022 04:24	60,228	327,699,468	295,115,000	0	2,281,472
8	Oct 3, 2022 04:13	60,232	318,328,689	294,139,000	1,000,000	2,478,080
9	Oct 3, 2022 04:02	60,234	325,358,805	294,145,000	1,000,000	2,281,472
10	Oct 3, 2022 04:24	60,239	317,655,457	295,171,000	0	2,400,256
11	Oct 3, 2022 04:13	60,246	324,512,157	294,204,000	1,000,000	2,396,160
12	Oct 3, 2022 04:02	60,253	323,608,529	295,242,000	0	2,404,352
13	Oct 3, 2022 04:13	60,254	316,493,206	294,244,000	1,000,000	2,281,472
14	Oct 3, 2022 04:13	60,258	320,195,140	295,265,000	0	2,510,848
15	Oct 3, 2022 04:02	60,262	315,612,078	294,284,000	1,000,000	2,281,472
16	Oct 3, 2022 04:24	60,283	322,890,888	295,386,000	0	2,281,472
17	Oct 3, 2022 04:13	60,284	323,289,664	295,390,000	0	2,281,472
18	Oct 3, 2022 04:02	60,285	326,030,675	295,396,000	0	2,281,472
19	Oct 3, 2022 04:24	60,286	320,285,740	295,401,000	0	2,281,472
20	Oct 3, 2022 04:02	60,288	321,963,997	294,409,000	1,001,000	2,400,256
21	Oct 3, 2022 04:02	60,293	319,325,642	294,437,000	1,001,000	2,482,176
22	Oct 3, 2022 04:24	60,318	324,833,942	294,559,000	998,000	2,482,176
23	Oct 3, 2022 04:13	60,326	321,303,180	294,601,000	998,000	2,404,352
24	Oct 3, 2022 04:24	60,328	322,751,348	294,609,000	998,000	2,281,472
25	Oct 3, 2022 04:13	60,334	318,645,622	294,639,000	998,000	2,281,472
26	Oct 3, 2022 04:13	60,387	321,001,979	294,896,000	999,000	2,281,472
27	Oct 3, 2022 04:13	60,396	317,388,932	293,939,000	1,999,000	2,396,160
28	Oct 3, 2022 04:02	60,559	354,939,067	296,737,114	0	2,265,088
29	Oct 3, 2022 04:13	60,573	357,688,416	296,807,320	0	2,273,280
30	Oct 3, 2022 04:24	60,576	362,567,831	296,821,630	0	2,273,280
31	Oct 3, 2022 04:02	60,577	363,382,782	296,826,739	0	2,265,088
32	Oct 3, 2022 04:24	60,587	353,284,905	296,875,208	0	2,260,992
33	Oct 3, 2022 04:13	60,601	356,736,244	296,947,339	0	2,265,088
34	Oct 3, 2022 04:13	60,616	371,580,806	297,018,253	0	2,269,184
35	Oct 3, 2022 04:24	61,619	358,476,383	301,933,587	0	2,265,088
36	Oct 3, 2022 04:02	61,636	381,032,816	302,017,810	0	2,269,184

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