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 03:10	3,150	61,141,267	33,632,000	1,019,000	2,277,376
2	Mar 30, 2026 03:07	3,151	62,422,683	33,639,000	1,019,000	2,281,472
3	Mar 30, 2026 03:09	3,151	57,253,826	33,647,000	1,019,000	2,404,352
4	Mar 30, 2026 03:08	3,152	60,221,858	33,653,000	1,019,000	2,277,376
5	Mar 30, 2026 03:10	3,153	60,713,557	33,660,000	1,020,000	2,400,256
6	Mar 30, 2026 03:10	3,153	62,985,053	34,687,000	0	2,387,968
7	Mar 30, 2026 03:09	3,154	58,766,569	33,679,000	1,020,000	2,277,376
8	Mar 30, 2026 03:06	3,156	60,890,983	32,731,000	1,983,000	2,277,376
9	Mar 30, 2026 03:12	3,165	61,845,228	32,829,000	1,989,000	2,277,376
10	Mar 30, 2026 03:05	3,166	68,370,173	32,838,000	1,990,000	2,510,848
11	Mar 30, 2026 03:04	3,166	64,934,036	32,841,000	1,990,000	2,404,352
12	Mar 30, 2026 03:02	3,166	61,993,216	32,832,000	1,989,000	2,277,376
13	Mar 30, 2026 03:11	3,167	64,130,611	32,847,000	1,990,000	2,277,376
14	Mar 30, 2026 03:03	3,167	59,709,209	33,845,000	995,000	2,277,376
15	Mar 30, 2026 03:06	3,167	62,253,397	32,851,000	1,990,000	2,277,376
16	Mar 30, 2026 03:11	3,167	61,235,333	33,846,000	995,000	2,277,376
17	Mar 30, 2026 03:04	3,167	62,594,111	32,846,000	1,990,000	2,396,160
18	Mar 30, 2026 03:06	3,167	68,785,240	33,839,000	995,000	2,277,376
19	Mar 30, 2026 03:00	3,167	66,487,451	32,847,000	1,990,000	2,277,376
20	Mar 30, 2026 03:09	3,168	62,963,348	32,852,000	1,991,000	2,277,376
21	Mar 30, 2026 03:07	3,168	59,543,570	33,854,000	995,000	2,396,160
22	Mar 30, 2026 03:06	3,168	65,405,493	34,843,000	0	2,400,256
23	Mar 30, 2026 03:05	3,168	58,218,291	33,853,000	995,000	2,408,448
24	Mar 30, 2026 03:00	3,168	64,550,999	32,859,000	1,991,000	2,277,376
25	Mar 30, 2026 03:02	3,168	62,360,200	32,856,000	1,991,000	2,482,176
26	Mar 30, 2026 03:04	3,168	62,922,905	32,858,000	1,991,000	2,400,256
27	Mar 30, 2026 03:09	3,169	63,318,440	33,860,000	995,000	2,400,256
28	Mar 30, 2026 03:10	3,169	59,557,084	32,868,000	1,992,000	2,277,376
29	Mar 30, 2026 03:00	3,169	59,929,070	32,870,000	1,992,000	2,277,376
30	Mar 30, 2026 03:01	3,169	61,880,667	33,859,000	995,000	2,273,280
31	Mar 30, 2026 03:07	3,169	62,611,012	33,862,000	995,000	2,277,376
32	Mar 30, 2026 03:07	3,169	60,447,944	32,872,000	1,992,000	2,277,376
33	Mar 30, 2026 03:00	3,169	62,126,899	32,871,000	1,992,000	2,277,376
34	Mar 30, 2026 03:12	3,170	61,651,364	33,871,000	996,000	2,277,376
35	Mar 30, 2026 03:07	3,170	61,624,648	33,873,000	996,000	2,396,160
36	Mar 30, 2026 03:04	3,171	63,731,878	32,887,000	1,993,000	2,277,376
37	Mar 30, 2026 03:02	3,172	60,104,627	33,871,000	1,026,000	2,277,376
38	Mar 30, 2026 03:02	3,172	65,628,626	32,895,000	1,993,000	2,392,064
39	Mar 30, 2026 03:03	3,172	61,703,454	32,895,000	1,993,000	2,277,376
40	Mar 30, 2026 03:10	3,173	58,859,124	33,908,000	997,000	2,400,256
41	Mar 30, 2026 03:09	3,173	59,127,457	33,910,000	997,000	2,392,064
42	Mar 30, 2026 03:07	3,174	59,997,729	32,916,000	1,994,000	2,400,256
43	Mar 30, 2026 03:06	3,174	57,245,174	33,920,000	997,000	2,387,968
44	Mar 30, 2026 03:04	3,174	57,218,306	32,922,000	1,995,000	2,519,040
45	Mar 30, 2026 03:05	3,176	56,259,987	33,936,000	998,000	2,277,376
46	Mar 30, 2026 03:01	3,176	58,473,849	33,935,000	998,000	2,277,376
47	Mar 30, 2026 03:09	3,176	57,947,148	32,942,000	1,996,000	2,277,376
48	Mar 30, 2026 03:12	3,178	63,072,080	32,962,000	1,997,000	2,277,376
49	Mar 30, 2026 03:01	3,179	62,547,083	32,975,000	1,998,000	2,404,352
50	Mar 30, 2026 03:08	3,182	58,533,984	34,006,000	1,000,000	2,277,376
51	Mar 30, 2026 03:02	3,182	57,608,516	33,002,000	2,000,000	2,494,464
52	Mar 30, 2026 03:08	3,183	57,875,795	33,008,000	2,000,000	2,404,352
53	Mar 30, 2026 03:10	3,184	56,509,446	34,027,000	1,000,000	2,277,376
54	Mar 30, 2026 03:03	3,184	60,190,569	33,025,000	2,001,000	2,404,352
55	Mar 30, 2026 03:06	3,184	62,333,949	34,029,000	1,000,000	2,277,376
56	Mar 30, 2026 03:04	3,184	59,555,525	33,018,000	2,001,000	2,404,352
57	Mar 30, 2026 03:02	3,186	56,608,797	35,048,000	0	2,277,376
58	Mar 30, 2026 03:11	3,186	64,445,549	34,050,000	1,001,000	2,392,064
59	Mar 30, 2026 03:00	3,189	61,897,023	33,078,000	2,004,000	2,277,376
60	Mar 30, 2026 03:00	3,193	62,040,935	34,119,000	1,003,000	2,400,256

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