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 11:32	3,144	61,212,689	33,567,000	1,017,000	2,277,376
2	Mar 30, 2026 11:28	3,151	64,799,457	34,660,000	0	2,392,064
3	Mar 30, 2026 11:26	3,151	65,018,313	33,637,000	1,019,000	2,277,376
4	Mar 30, 2026 11:24	3,152	63,399,286	33,649,000	1,019,000	2,277,376
5	Mar 30, 2026 11:29	3,154	64,571,953	33,678,000	1,020,000	2,404,352
6	Mar 30, 2026 11:36	3,154	64,114,964	34,698,000	0	2,392,064
7	Mar 30, 2026 11:32	3,156	60,446,777	33,699,000	1,021,000	2,277,376
8	Mar 30, 2026 11:37	3,164	62,414,573	32,813,000	1,988,000	2,277,376
9	Mar 30, 2026 11:37	3,165	61,316,160	32,828,000	1,989,000	2,396,160
10	Mar 30, 2026 11:27	3,166	68,669,376	32,835,000	1,990,000	2,392,064
11	Mar 30, 2026 11:33	3,167	64,502,265	33,839,000	995,000	2,277,376
12	Mar 30, 2026 11:35	3,167	61,289,963	32,843,000	1,990,000	2,396,160
13	Mar 30, 2026 11:26	3,167	63,196,157	34,841,000	0	2,392,064
14	Mar 30, 2026 11:32	3,167	59,741,603	33,846,000	995,000	2,273,280
15	Mar 30, 2026 11:29	3,167	63,171,511	34,842,000	0	2,400,256
16	Mar 30, 2026 11:24	3,167	60,470,437	32,844,000	1,990,000	2,400,256
17	Mar 30, 2026 11:30	3,168	60,586,158	33,848,000	995,000	2,277,376
18	Mar 30, 2026 11:33	3,168	61,049,744	32,855,000	1,991,000	2,502,656
19	Mar 30, 2026 11:36	3,168	69,499,850	33,855,000	995,000	2,277,376
20	Mar 30, 2026 11:24	3,168	62,806,029	33,854,000	995,000	2,277,376
21	Mar 30, 2026 11:32	3,169	63,911,717	32,870,000	1,992,000	2,277,376
22	Mar 30, 2026 11:34	3,169	61,888,557	32,867,000	1,991,000	2,404,352
23	Mar 30, 2026 11:34	3,169	64,371,830	32,871,000	1,992,000	2,396,160
24	Mar 30, 2026 11:36	3,169	61,975,462	33,865,000	996,000	2,277,376
25	Mar 30, 2026 11:31	3,169	60,325,841	34,862,000	0	2,396,160
26	Mar 30, 2026 11:37	3,169	63,077,715	33,861,000	995,000	2,400,256
27	Mar 30, 2026 11:37	3,169	61,925,733	33,860,000	995,000	2,392,064
28	Mar 30, 2026 11:31	3,169	67,142,260	32,869,000	1,992,000	2,519,040
29	Mar 30, 2026 11:27	3,169	65,756,385	33,868,000	996,000	2,277,376
30	Mar 30, 2026 11:28	3,169	57,335,159	34,860,000	0	2,510,848
31	Mar 30, 2026 11:28	3,169	67,244,385	33,861,000	995,000	2,277,376
32	Mar 30, 2026 11:34	3,170	65,269,167	33,870,000	996,000	2,404,352
33	Mar 30, 2026 11:32	3,170	59,340,984	34,870,000	0	2,392,064
34	Mar 30, 2026 11:24	3,170	58,066,382	32,877,000	1,992,000	2,408,448
35	Mar 30, 2026 11:30	3,171	56,241,494	33,882,000	996,000	2,277,376
36	Mar 30, 2026 11:25	3,171	59,233,529	32,886,000	1,993,000	2,277,376
37	Mar 30, 2026 11:26	3,171	59,222,997	32,887,000	1,993,000	2,277,376
38	Mar 30, 2026 11:28	3,172	57,931,213	32,899,000	1,993,000	2,277,376
39	Mar 30, 2026 11:24	3,173	59,486,127	32,905,000	1,994,000	2,277,376
40	Mar 30, 2026 11:34	3,173	62,941,128	33,882,000	1,026,000	2,277,376
41	Mar 30, 2026 11:24	3,173	58,458,895	33,903,000	997,000	2,404,352
42	Mar 30, 2026 11:26	3,173	57,956,021	33,909,000	997,000	2,277,376
43	Mar 30, 2026 11:28	3,174	62,749,697	32,915,000	1,994,000	2,396,160
44	Mar 30, 2026 11:34	3,175	61,013,700	32,925,000	1,995,000	2,277,376
45	Mar 30, 2026 11:33	3,176	58,675,150	32,940,000	1,996,000	2,277,376
46	Mar 30, 2026 11:26	3,176	57,025,849	32,936,000	1,996,000	2,277,376
47	Mar 30, 2026 11:37	3,176	63,300,177	33,941,000	998,000	2,400,256
48	Mar 30, 2026 11:31	3,177	58,480,249	32,951,000	1,997,000	2,400,256
49	Mar 30, 2026 11:32	3,178	62,434,454	32,961,000	1,997,000	2,277,376
50	Mar 30, 2026 11:28	3,180	56,413,954	33,985,000	999,000	2,404,352
51	Mar 30, 2026 11:37	3,181	57,020,218	33,995,000	999,000	2,404,352
52	Mar 30, 2026 11:30	3,181	58,844,773	32,994,000	1,999,000	2,404,352
53	Mar 30, 2026 11:25	3,181	60,327,709	32,994,000	1,999,000	2,277,376
54	Mar 30, 2026 11:35	3,183	57,777,122	33,008,000	2,000,000	2,281,472
55	Mar 30, 2026 11:25	3,184	58,202,362	33,020,000	2,001,000	2,277,376
56	Mar 30, 2026 11:35	3,184	57,689,231	34,019,000	1,000,000	2,494,464
57	Mar 30, 2026 11:27	3,184	60,084,450	33,027,000	2,001,000	2,400,256
58	Mar 30, 2026 11:29	3,186	58,282,405	33,047,000	2,002,000	2,277,376
59	Mar 30, 2026 11:34	3,187	57,431,868	33,052,000	2,003,000	2,400,256
60	Mar 30, 2026 11:26	3,191	59,509,142	34,095,000	1,002,000	2,277,376

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