Parse JSON

Compute the total amount of non-canceled external USD transactions from a stream of JSON records as fast as possible.

Input: 1 000 000 JSON records on STDIN, one per line. Each record has the following structure:

{
    "user_id": 0,
    "currency": "USD",
    "transactions": [
        {
            "amount": 0,
            "to_user_id": 0,
            "canceled": false
        }
    ]
}

Field	Constraints
`user_id`	Integer, max 10 000
`currency`	One of `"GBP"`, `"USD"`, `"RUB"`, `"JPY"`, `"CHF"`
`transactions`	Array, max 10 elements
`amount`	Integer, max 1000
`canceled`	Boolean; may be omitted when `false`

Field order is not guaranteed within any object.

Output: The total amount of all transactions where:

record.currency == "USD"
transaction.to_user_id != record.user_id (external)
transaction.canceled is false or absent

Restrictions:60s512Mb 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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olliecrowScore: 3,168Success

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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory
1	Mar 30, 2026 00:53	3,149	69,423,324	33,622,000	1,018,000	2,277,376
2	Mar 30, 2026 00:51	3,151	64,450,244	34,657,000	0	2,277,376
3	Mar 30, 2026 00:44	3,151	64,191,060	34,662,000	0	2,277,376
4	Mar 30, 2026 00:52	3,152	61,033,263	34,673,000	0	2,387,968
5	Mar 30, 2026 00:48	3,152	64,472,933	34,670,000	0	2,510,848
6	Mar 30, 2026 00:49	3,152	64,648,382	33,648,000	1,019,000	2,277,376
7	Mar 30, 2026 00:47	3,152	61,352,620	33,651,000	1,019,000	2,277,376
8	Mar 30, 2026 00:54	3,152	62,731,306	33,654,000	1,019,000	2,400,256
9	Mar 30, 2026 00:50	3,153	61,533,027	34,682,000	0	2,408,448
10	Mar 30, 2026 00:46	3,154	61,636,979	34,697,000	0	2,277,376
11	Mar 30, 2026 00:52	3,154	65,025,769	33,673,000	1,020,000	2,277,376
12	Mar 30, 2026 00:55	3,154	66,230,610	33,674,000	1,020,000	2,383,872
13	Mar 30, 2026 00:52	3,155	60,802,187	33,687,000	1,020,000	2,404,352
14	Mar 30, 2026 00:51	3,155	60,642,389	33,685,000	1,020,000	2,277,376
15	Mar 30, 2026 00:46	3,156	62,332,891	34,713,000	0	2,404,352
16	Mar 30, 2026 00:53	3,165	57,107,223	34,814,000	0	2,277,376
17	Mar 30, 2026 00:46	3,167	62,266,773	33,845,000	995,000	2,277,376
18	Mar 30, 2026 00:45	3,167	61,655,034	33,847,000	995,000	2,392,064
19	Mar 30, 2026 00:52	3,167	60,492,872	33,845,000	995,000	2,277,376
20	Mar 30, 2026 00:50	3,168	62,401,671	32,856,000	1,991,000	2,277,376
21	Mar 30, 2026 00:44	3,168	64,061,320	32,855,000	1,991,000	2,392,064
22	Mar 30, 2026 00:48	3,168	62,112,200	33,852,000	995,000	2,400,256
23	Mar 30, 2026 00:51	3,168	63,671,398	32,855,000	1,991,000	2,277,376
24	Mar 30, 2026 00:53	3,168	63,204,781	32,856,000	1,991,000	2,277,376
25	Mar 30, 2026 00:47	3,168	67,013,877	34,846,000	0	2,396,160
26	Mar 30, 2026 00:47	3,168	60,454,790	32,855,000	1,991,000	2,400,256
27	Mar 30, 2026 00:53	3,168	61,825,528	33,849,000	995,000	2,277,376
28	Mar 30, 2026 00:46	3,168	62,032,685	32,858,000	1,991,000	2,494,464
29	Mar 30, 2026 00:53	3,168	61,424,514	34,852,000	0	2,277,376
30	Mar 30, 2026 00:45	3,168	68,133,465	33,848,000	995,000	2,277,376
31	Mar 30, 2026 00:44	3,168	59,548,759	33,852,000	995,000	2,277,376
32	Mar 30, 2026 00:48	3,169	60,658,491	33,862,000	995,000	2,277,376
33	Mar 30, 2026 00:48	3,169	65,994,533	33,859,000	995,000	2,408,448
34	Mar 30, 2026 00:47	3,169	65,339,589	32,870,000	1,992,000	2,277,376
35	Mar 30, 2026 00:46	3,169	59,780,242	33,860,000	995,000	2,400,256
36	Mar 30, 2026 00:51	3,170	58,286,015	33,878,000	996,000	2,400,256
37	Mar 30, 2026 00:55	3,170	61,306,871	34,874,000	0	2,273,280
38	Mar 30, 2026 00:50	3,170	67,756,411	33,869,000	996,000	2,400,256
39	Mar 30, 2026 00:50	3,170	56,505,911	34,866,000	0	2,277,376
40	Mar 30, 2026 00:50	3,170	56,657,981	33,846,000	1,025,000	2,277,376
41	Mar 30, 2026 00:51	3,170	66,856,316	33,871,000	996,000	2,277,376
42	Mar 30, 2026 00:44	3,171	64,913,206	32,884,000	1,992,000	2,273,280
43	Mar 30, 2026 00:54	3,171	66,957,910	33,890,000	996,000	2,277,376
44	Mar 30, 2026 00:52	3,172	61,067,354	32,901,000	1,994,000	2,277,376
45	Mar 30, 2026 00:45	3,173	58,218,282	33,908,000	997,000	2,400,256
46	Mar 30, 2026 00:54	3,174	62,187,999	32,920,000	1,995,000	2,392,064
47	Mar 30, 2026 00:47	3,176	58,841,106	33,939,000	998,000	2,277,376
48	Mar 30, 2026 00:48	3,177	61,241,409	32,948,000	1,996,000	2,277,376
49	Mar 30, 2026 00:53	3,178	61,501,399	32,957,000	1,997,000	2,277,376
50	Mar 30, 2026 00:55	3,178	62,244,604	33,961,000	998,000	2,277,376
51	Mar 30, 2026 00:48	3,179	57,516,391	32,974,000	1,998,000	2,396,160
52	Mar 30, 2026 00:52	3,180	56,323,887	32,981,000	1,998,000	2,400,256
53	Mar 30, 2026 00:49	3,181	58,201,952	33,996,000	999,000	2,392,064
54	Mar 30, 2026 00:44	3,181	59,315,672	32,997,000	1,999,000	2,277,376
55	Mar 30, 2026 00:51	3,182	59,439,929	34,002,000	1,000,000	2,400,256
56	Mar 30, 2026 00:47	3,185	55,071,321	34,031,000	1,000,000	2,510,848
57	Mar 30, 2026 00:44	3,186	58,128,842	33,047,000	2,002,000	2,277,376
58	Mar 30, 2026 00:49	3,187	60,678,806	34,059,000	1,001,000	2,277,376
59	Mar 30, 2026 00:50	3,187	61,337,090	33,057,000	2,003,000	2,277,376
60	Mar 30, 2026 00:46	3,188	58,299,625	34,063,000	1,001,000	2,396,160

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