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 11:05	3,148	62,031,577	34,623,000	0	2,396,160
2	Mar 30, 2026 10:55	3,148	62,163,577	33,615,000	1,018,000	2,277,376
3	Mar 30, 2026 11:02	3,149	59,251,667	33,622,000	1,018,000	2,396,160
4	Mar 30, 2026 10:59	3,150	62,435,718	33,627,000	1,019,000	2,265,088
5	Mar 30, 2026 10:54	3,151	64,027,311	33,645,000	1,019,000	2,404,352
6	Mar 30, 2026 10:54	3,152	64,967,553	34,670,000	0	2,392,064
7	Mar 30, 2026 10:56	3,153	61,323,237	33,662,000	1,020,000	2,408,448
8	Mar 30, 2026 11:12	3,153	61,401,143	33,661,000	1,020,000	2,273,280
9	Mar 30, 2026 11:12	3,154	62,264,035	34,694,000	0	2,400,256
10	Mar 30, 2026 11:05	3,156	66,653,077	34,712,000	0	2,277,376
11	Mar 30, 2026 11:07	3,163	57,844,289	33,804,000	994,000	2,277,376
12	Mar 30, 2026 11:09	3,165	58,274,616	32,825,000	1,989,000	2,473,984
13	Mar 30, 2026 11:08	3,165	62,076,215	33,819,000	994,000	2,396,160
14	Mar 30, 2026 10:56	3,165	62,535,490	32,821,000	1,989,000	2,277,376
15	Mar 30, 2026 10:55	3,166	58,470,668	32,835,000	1,990,000	2,277,376
16	Mar 30, 2026 11:11	3,167	66,760,137	32,844,000	1,990,000	2,277,376
17	Mar 30, 2026 11:09	3,167	65,805,059	33,843,000	995,000	2,277,376
18	Mar 30, 2026 11:09	3,168	71,469,786	34,852,000	0	2,396,160
19	Mar 30, 2026 10:54	3,168	65,475,250	32,857,000	1,991,000	2,277,376
20	Mar 30, 2026 11:10	3,168	60,044,101	33,856,000	995,000	2,510,848
21	Mar 30, 2026 11:03	3,169	62,306,680	32,866,000	1,991,000	2,408,448
22	Mar 30, 2026 10:56	3,169	64,480,834	33,860,000	995,000	2,277,376
23	Mar 30, 2026 11:09	3,169	60,050,066	33,863,000	995,000	2,404,352
24	Mar 30, 2026 10:56	3,169	60,330,347	34,857,000	0	2,277,376
25	Mar 30, 2026 10:56	3,169	60,768,619	32,868,000	1,992,000	2,277,376
26	Mar 30, 2026 11:10	3,169	65,671,100	33,868,000	996,000	2,277,376
27	Mar 30, 2026 11:11	3,169	55,433,421	33,866,000	996,000	2,277,376
28	Mar 30, 2026 11:08	3,169	64,687,255	32,867,000	1,991,000	2,392,064
29	Mar 30, 2026 10:56	3,169	62,025,097	34,864,000	0	2,277,376
30	Mar 30, 2026 11:08	3,169	60,656,810	34,864,000	0	2,277,376
31	Mar 30, 2026 11:11	3,170	59,466,740	32,874,000	1,992,000	2,277,376
32	Mar 30, 2026 11:09	3,170	60,631,915	33,870,000	996,000	2,277,376
33	Mar 30, 2026 10:59	3,171	59,484,046	33,881,000	996,000	2,277,376
34	Mar 30, 2026 11:08	3,171	63,256,703	33,884,000	996,000	2,396,160
35	Mar 30, 2026 11:03	3,171	59,275,246	33,887,000	996,000	2,277,376
36	Mar 30, 2026 11:05	3,172	61,428,095	32,899,000	1,993,000	2,396,160
37	Mar 30, 2026 11:00	3,172	59,311,524	32,896,000	1,993,000	2,523,136
38	Mar 30, 2026 11:09	3,173	56,561,361	33,908,000	997,000	2,404,352
39	Mar 30, 2026 10:55	3,173	58,751,652	32,912,000	1,994,000	2,277,376
40	Mar 30, 2026 11:06	3,174	61,943,142	32,916,000	1,994,000	2,277,376
41	Mar 30, 2026 11:12	3,174	59,302,703	32,920,000	1,995,000	2,277,376
42	Mar 30, 2026 11:12	3,174	59,694,104	32,920,000	1,995,000	2,281,472
43	Mar 30, 2026 11:00	3,174	61,915,492	32,917,000	1,995,000	2,400,256
44	Mar 30, 2026 11:00	3,175	60,569,188	32,934,000	1,996,000	2,396,160
45	Mar 30, 2026 11:08	3,176	59,474,134	32,935,000	1,996,000	2,273,280
46	Mar 30, 2026 11:08	3,177	58,827,946	33,951,000	998,000	2,277,376
47	Mar 30, 2026 11:12	3,177	58,239,438	33,945,000	998,000	2,277,376
48	Mar 30, 2026 11:02	3,177	59,022,221	32,950,000	1,997,000	2,277,376
49	Mar 30, 2026 11:03	3,177	58,392,271	32,952,000	1,997,000	2,277,376
50	Mar 30, 2026 11:06	3,178	59,292,566	32,962,000	1,997,000	2,392,064
51	Mar 30, 2026 10:54	3,181	64,063,689	32,988,000	1,999,000	2,277,376
52	Mar 30, 2026 11:06	3,182	59,737,575	33,998,000	999,000	2,396,160
53	Mar 30, 2026 11:07	3,182	59,423,119	34,004,000	1,000,000	2,277,376
54	Mar 30, 2026 11:07	3,182	61,933,114	34,005,000	1,000,000	2,277,376
55	Mar 30, 2026 10:59	3,183	58,334,475	34,015,000	1,000,000	2,277,376
56	Mar 30, 2026 11:02	3,184	59,148,858	34,024,000	1,000,000	2,277,376
57	Mar 30, 2026 11:10	3,184	59,839,436	34,028,000	1,000,000	2,277,376
58	Mar 30, 2026 11:12	3,184	68,318,297	34,029,000	1,000,000	2,404,352
59	Mar 30, 2026 10:54	3,185	57,326,874	34,030,000	1,000,000	2,387,968
60	Mar 30, 2026 10:54	3,189	57,676,439	33,080,000	2,004,000	2,400,256

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