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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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory
1	Mar 30, 2026 08:33	3,146	64,160,207	33,584,000	1,017,000	2,277,376
2	Mar 30, 2026 08:35	3,150	59,646,619	33,632,000	1,019,000	2,404,352
3	Mar 30, 2026 08:33	3,151	61,803,689	34,666,000	0	2,277,376
4	Mar 30, 2026 08:30	3,152	59,755,660	34,677,000	0	2,277,376
5	Mar 30, 2026 08:42	3,152	66,617,519	33,654,000	1,019,000	2,277,376
6	Mar 30, 2026 08:40	3,152	61,290,815	33,651,000	1,019,000	2,277,376
7	Mar 30, 2026 08:42	3,153	59,904,625	33,663,000	1,020,000	2,400,256
8	Mar 30, 2026 08:40	3,154	60,575,241	34,699,000	0	2,400,256
9	Mar 30, 2026 08:39	3,154	62,773,225	34,696,000	0	2,408,448
10	Mar 30, 2026 08:38	3,154	61,287,871	33,678,000	1,020,000	2,404,352
11	Mar 30, 2026 08:42	3,155	63,824,151	33,686,000	1,020,000	2,277,376
12	Mar 30, 2026 08:35	3,155	64,691,859	34,708,000	0	2,408,448
13	Mar 30, 2026 08:35	3,155	62,246,290	34,707,000	0	2,277,376
14	Mar 30, 2026 08:35	3,165	64,260,998	33,822,000	994,000	2,277,376
15	Mar 30, 2026 08:35	3,166	63,125,600	33,836,000	995,000	2,277,376
16	Mar 30, 2026 08:34	3,166	60,975,263	32,833,000	1,989,000	2,404,352
17	Mar 30, 2026 08:36	3,167	64,845,642	34,839,000	0	2,277,376
18	Mar 30, 2026 08:38	3,167	66,153,201	32,851,000	1,991,000	2,383,872
19	Mar 30, 2026 08:38	3,167	59,265,537	32,848,000	1,990,000	2,277,376
20	Mar 30, 2026 08:32	3,167	58,961,815	33,845,000	995,000	2,482,176
21	Mar 30, 2026 08:32	3,167	61,367,406	34,838,000	0	2,277,376
22	Mar 30, 2026 08:38	3,168	60,113,854	33,849,000	995,000	2,510,848
23	Mar 30, 2026 08:36	3,168	61,454,471	33,856,000	995,000	2,404,352
24	Mar 30, 2026 08:39	3,168	60,653,062	33,853,000	995,000	2,277,376
25	Mar 30, 2026 08:40	3,168	64,980,255	33,855,000	995,000	2,396,160
26	Mar 30, 2026 08:42	3,168	59,095,316	33,849,000	995,000	2,519,040
27	Mar 30, 2026 08:32	3,168	64,412,492	33,857,000	995,000	2,277,376
28	Mar 30, 2026 08:33	3,168	67,749,849	33,851,000	995,000	2,408,448
29	Mar 30, 2026 08:35	3,169	67,750,516	33,863,000	995,000	2,396,160
30	Mar 30, 2026 08:42	3,169	57,235,357	32,872,000	1,992,000	2,404,352
31	Mar 30, 2026 08:41	3,169	63,288,049	32,868,000	1,992,000	2,277,376
32	Mar 30, 2026 08:40	3,169	64,075,264	33,866,000	996,000	2,277,376
33	Mar 30, 2026 08:39	3,169	63,319,979	33,867,000	996,000	2,277,376
34	Mar 30, 2026 08:31	3,170	64,355,467	32,879,000	1,992,000	2,392,064
35	Mar 30, 2026 08:33	3,170	59,515,171	32,873,000	1,992,000	2,277,376
36	Mar 30, 2026 08:33	3,171	65,913,185	32,892,000	1,993,000	2,277,376
37	Mar 30, 2026 08:30	3,173	57,703,589	32,907,000	1,994,000	2,400,256
38	Mar 30, 2026 08:32	3,173	59,274,658	31,913,000	2,991,000	2,273,280
39	Mar 30, 2026 08:42	3,174	59,676,752	32,921,000	1,995,000	2,277,376
40	Mar 30, 2026 08:37	3,175	57,883,597	32,934,000	1,996,000	2,277,376
41	Mar 30, 2026 08:38	3,177	62,614,586	33,951,000	998,000	2,400,256
42	Mar 30, 2026 08:33	3,177	61,386,849	33,949,000	998,000	2,277,376
43	Mar 30, 2026 08:36	3,177	56,566,552	32,952,000	1,997,000	2,277,376
44	Mar 30, 2026 08:31	3,177	59,415,764	32,947,000	1,996,000	2,277,376
45	Mar 30, 2026 08:30	3,179	57,318,354	33,971,000	999,000	2,277,376
46	Mar 30, 2026 08:41	3,179	62,817,952	33,973,000	999,000	2,277,376
47	Mar 30, 2026 08:32	3,180	58,914,302	32,979,000	1,998,000	2,277,376
48	Mar 30, 2026 08:34	3,180	63,586,049	33,982,000	999,000	2,277,376
49	Mar 30, 2026 08:40	3,180	59,144,716	33,986,000	999,000	2,277,376
50	Mar 30, 2026 08:38	3,183	58,886,715	33,008,000	2,000,000	2,277,376
51	Mar 30, 2026 08:37	3,183	58,634,204	33,012,000	2,000,000	2,277,376
52	Mar 30, 2026 08:34	3,184	55,794,155	34,026,000	1,000,000	2,404,352
53	Mar 30, 2026 08:41	3,184	60,528,816	34,022,000	1,000,000	2,277,376
54	Mar 30, 2026 08:32	3,184	61,629,576	34,027,000	1,000,000	2,277,376
55	Mar 30, 2026 08:31	3,185	62,174,976	34,039,000	1,001,000	2,396,160
56	Mar 30, 2026 08:40	3,186	58,656,677	33,039,000	2,002,000	2,277,376
57	Mar 30, 2026 08:37	3,320	62,162,877	35,507,000	1,014,000	2,392,064

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