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 04:06	3,148	59,633,740	33,606,000	1,018,000	2,396,160
2	Mar 30, 2026 03:58	3,149	59,800,100	33,618,000	1,018,000	2,277,376
3	Mar 30, 2026 04:00	3,152	60,533,456	33,648,000	1,019,000	2,482,176
4	Mar 30, 2026 04:08	3,152	67,975,290	34,675,000	0	2,277,376
5	Mar 30, 2026 03:57	3,153	60,843,478	33,697,000	991,000	2,392,064
6	Mar 30, 2026 04:00	3,154	60,447,664	34,695,000	0	2,392,064
7	Mar 30, 2026 04:07	3,155	71,588,545	33,685,000	1,020,000	2,277,376
8	Mar 30, 2026 04:01	3,155	67,687,912	34,709,000	0	2,277,376
9	Mar 30, 2026 04:08	3,163	60,253,168	33,799,000	994,000	2,404,352
10	Mar 30, 2026 03:57	3,164	60,924,046	32,820,000	1,989,000	2,392,064
11	Mar 30, 2026 03:56	3,166	64,890,213	32,840,000	1,990,000	2,277,376
12	Mar 30, 2026 04:00	3,167	62,517,126	34,842,000	0	2,400,256
13	Mar 30, 2026 04:05	3,167	61,666,712	33,845,000	995,000	2,392,064
14	Mar 30, 2026 03:59	3,167	64,059,985	34,842,000	0	2,277,376
15	Mar 30, 2026 03:58	3,167	64,248,571	33,847,000	995,000	2,281,472
16	Mar 30, 2026 03:57	3,167	60,638,713	33,845,000	995,000	2,396,160
17	Mar 30, 2026 04:00	3,167	62,992,495	33,838,000	995,000	2,277,376
18	Mar 30, 2026 04:08	3,167	65,474,804	33,843,000	995,000	2,277,376
19	Mar 30, 2026 04:01	3,167	61,524,354	33,845,000	995,000	2,277,376
20	Mar 30, 2026 04:04	3,168	59,686,110	33,848,000	995,000	2,277,376
21	Mar 30, 2026 04:00	3,168	63,259,654	34,853,000	0	2,412,544
22	Mar 30, 2026 03:58	3,168	60,542,474	33,858,000	995,000	2,277,376
23	Mar 30, 2026 04:06	3,168	62,580,602	32,860,000	1,991,000	2,396,160
24	Mar 30, 2026 04:06	3,168	58,487,859	33,858,000	995,000	2,277,376
25	Mar 30, 2026 03:57	3,168	61,231,240	33,857,000	995,000	2,277,376
26	Mar 30, 2026 04:06	3,168	61,630,233	32,854,000	1,991,000	2,277,376
27	Mar 30, 2026 03:55	3,168	60,347,622	33,856,000	995,000	2,396,160
28	Mar 30, 2026 04:04	3,169	65,066,835	33,862,000	995,000	2,277,376
29	Mar 30, 2026 04:04	3,169	56,673,709	33,836,000	1,025,000	2,277,376
30	Mar 30, 2026 04:04	3,169	64,473,231	32,864,000	1,991,000	2,277,376
31	Mar 30, 2026 03:55	3,169	55,268,260	33,864,000	996,000	2,404,352
32	Mar 30, 2026 04:01	3,169	62,984,241	32,870,000	1,992,000	2,412,544
33	Mar 30, 2026 03:55	3,169	65,701,614	32,871,000	1,992,000	2,277,376
34	Mar 30, 2026 03:59	3,169	64,315,933	32,870,000	1,992,000	2,277,376
35	Mar 30, 2026 03:56	3,169	63,103,868	32,863,000	1,991,000	2,277,376
36	Mar 30, 2026 03:57	3,169	61,111,769	32,871,000	1,992,000	2,400,256
37	Mar 30, 2026 04:03	3,170	63,221,906	32,876,000	1,992,000	2,404,352
38	Mar 30, 2026 04:06	3,170	64,051,390	33,869,000	996,000	2,277,376
39	Mar 30, 2026 04:00	3,173	58,989,453	32,909,000	1,994,000	2,269,184
40	Mar 30, 2026 04:03	3,174	55,734,590	32,920,000	1,995,000	2,277,376
41	Mar 30, 2026 04:04	3,174	60,403,479	32,915,000	1,994,000	2,392,064
42	Mar 30, 2026 04:04	3,174	55,798,849	32,924,000	1,995,000	2,277,376
43	Mar 30, 2026 04:07	3,174	59,468,319	32,920,000	1,995,000	2,392,064
44	Mar 30, 2026 03:56	3,174	57,895,539	32,921,000	1,995,000	2,269,184
45	Mar 30, 2026 04:05	3,175	55,911,796	32,930,000	1,995,000	2,396,160
46	Mar 30, 2026 03:56	3,178	59,931,143	32,958,000	1,997,000	2,404,352
47	Mar 30, 2026 04:06	3,178	59,335,506	33,965,000	998,000	2,396,160
48	Mar 30, 2026 04:05	3,178	59,728,753	32,958,000	1,997,000	2,396,160
49	Mar 30, 2026 03:57	3,179	59,563,181	32,976,000	1,998,000	2,392,064
50	Mar 30, 2026 04:08	3,181	55,431,728	32,997,000	1,999,000	2,277,376
51	Mar 30, 2026 04:08	3,182	59,781,717	34,000,000	1,000,000	2,396,160
52	Mar 30, 2026 04:08	3,182	57,304,466	34,002,000	1,000,000	2,400,256
53	Mar 30, 2026 03:56	3,183	53,356,861	34,008,000	1,000,000	2,277,376
54	Mar 30, 2026 03:56	3,184	62,201,091	34,028,000	1,000,000	2,277,376
55	Mar 30, 2026 04:03	3,185	58,032,043	34,038,000	1,001,000	2,277,376
56	Mar 30, 2026 04:07	3,187	56,749,317	34,058,000	1,001,000	2,404,352
57	Mar 30, 2026 03:59	3,187	52,268,710	34,052,000	1,001,000	2,277,376

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