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 04:36	3,148	68,633,116	34,632,000	0	2,277,376
2	Mar 30, 2026 04:39	3,151	69,161,341	33,637,000	1,019,000	2,396,160
3	Mar 30, 2026 04:46	3,151	63,904,868	34,663,000	0	2,387,968
4	Mar 30, 2026 04:38	3,152	57,797,020	33,658,000	1,019,000	2,277,376
5	Mar 30, 2026 04:36	3,153	63,468,195	33,660,000	1,020,000	2,396,160
6	Mar 30, 2026 04:37	3,153	60,532,798	33,667,000	1,020,000	2,400,256
7	Mar 30, 2026 04:43	3,154	67,387,810	34,690,000	0	2,277,376
8	Mar 30, 2026 04:45	3,157	59,475,497	33,710,000	1,021,000	2,400,256
9	Mar 30, 2026 04:39	3,163	64,152,061	32,804,000	1,988,000	2,277,376
10	Mar 30, 2026 04:42	3,165	58,575,594	33,817,000	994,000	2,482,176
11	Mar 30, 2026 04:40	3,166	59,463,299	34,830,000	0	2,400,256
12	Mar 30, 2026 04:42	3,167	59,780,974	33,838,000	995,000	2,400,256
13	Mar 30, 2026 04:40	3,167	68,730,151	32,847,000	1,990,000	2,404,352
14	Mar 30, 2026 04:44	3,168	62,623,649	32,861,000	1,991,000	2,277,376
15	Mar 30, 2026 04:44	3,168	61,858,175	32,855,000	1,991,000	2,404,352
16	Mar 30, 2026 04:45	3,168	60,972,472	33,856,000	995,000	2,277,376
17	Mar 30, 2026 04:39	3,168	62,505,427	32,856,000	1,991,000	2,277,376
18	Mar 30, 2026 04:40	3,168	66,611,704	33,854,000	995,000	2,404,352
19	Mar 30, 2026 04:38	3,168	67,036,570	33,850,000	995,000	2,404,352
20	Mar 30, 2026 04:48	3,168	61,320,407	32,859,000	1,991,000	2,404,352
21	Mar 30, 2026 04:46	3,168	62,677,231	33,856,000	995,000	2,277,376
22	Mar 30, 2026 04:46	3,168	68,308,754	33,855,000	995,000	2,277,376
23	Mar 30, 2026 04:43	3,168	59,566,791	32,857,000	1,991,000	2,277,376
24	Mar 30, 2026 04:41	3,168	61,187,152	32,852,000	1,991,000	2,408,448
25	Mar 30, 2026 04:41	3,168	65,080,774	33,851,000	995,000	2,277,376
26	Mar 30, 2026 04:43	3,168	65,711,350	33,852,000	995,000	2,277,376
27	Mar 30, 2026 04:42	3,169	60,020,980	34,858,000	0	2,277,376
28	Mar 30, 2026 04:43	3,169	65,244,212	34,854,000	0	2,404,352
29	Mar 30, 2026 04:36	3,169	64,834,859	32,865,000	1,991,000	2,404,352
30	Mar 30, 2026 04:47	3,169	68,116,647	32,864,000	1,991,000	2,400,256
31	Mar 30, 2026 04:38	3,169	61,812,906	33,860,000	995,000	2,396,160
32	Mar 30, 2026 04:38	3,169	63,628,939	33,864,000	996,000	2,400,256
33	Mar 30, 2026 04:42	3,170	65,937,709	33,874,000	996,000	2,404,352
34	Mar 30, 2026 04:47	3,170	60,477,250	32,876,000	1,992,000	2,400,256
35	Mar 30, 2026 04:36	3,170	65,523,946	33,876,000	996,000	2,392,064
36	Mar 30, 2026 04:45	3,170	59,292,465	34,870,000	0	2,277,376
37	Mar 30, 2026 04:46	3,171	56,780,643	34,877,000	0	2,277,376
38	Mar 30, 2026 04:48	3,172	60,004,411	34,890,000	0	2,277,376
39	Mar 30, 2026 04:43	3,172	57,483,999	32,903,000	1,994,000	2,478,080
40	Mar 30, 2026 04:45	3,174	61,599,703	32,915,000	1,994,000	2,277,376
41	Mar 30, 2026 04:37	3,175	57,901,560	32,930,000	1,995,000	2,396,160
42	Mar 30, 2026 04:45	3,175	55,800,760	32,926,000	1,995,000	2,400,256
43	Mar 30, 2026 04:47	3,176	65,524,640	32,935,000	1,996,000	2,400,256
44	Mar 30, 2026 04:43	3,176	57,636,029	33,940,000	998,000	2,400,256
45	Mar 30, 2026 04:42	3,177	60,358,976	33,949,000	998,000	2,277,376
46	Mar 30, 2026 04:36	3,177	60,268,166	33,945,000	998,000	2,277,376
47	Mar 30, 2026 04:44	3,177	60,030,406	33,945,000	998,000	2,277,376
48	Mar 30, 2026 04:41	3,177	58,291,333	33,944,000	998,000	2,392,064
49	Mar 30, 2026 04:38	3,178	62,526,831	32,956,000	1,997,000	2,277,376
50	Mar 30, 2026 04:46	3,179	59,809,641	32,972,000	1,998,000	2,486,272
51	Mar 30, 2026 04:38	3,180	63,542,288	33,980,000	999,000	2,277,376
52	Mar 30, 2026 04:40	3,180	60,236,553	32,977,000	1,998,000	2,396,160
53	Mar 30, 2026 04:40	3,181	59,970,637	33,992,000	999,000	2,400,256
54	Mar 30, 2026 04:40	3,182	57,616,269	33,003,000	2,000,000	2,277,376
55	Mar 30, 2026 04:36	3,184	57,441,447	33,020,000	2,001,000	2,387,968
56	Mar 30, 2026 04:42	3,184	61,170,693	34,022,000	1,000,000	2,277,376
57	Mar 30, 2026 04:45	3,185	58,938,571	34,039,000	1,001,000	2,404,352
58	Mar 30, 2026 04:46	3,185	57,124,527	33,038,000	2,002,000	2,478,080
59	Mar 30, 2026 04:48	3,190	67,958,271	32,082,000	3,007,000	2,273,280
60	Mar 30, 2026 04:37	3,191	61,070,983	34,095,000	1,002,000	2,494,464

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