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 00:21	3,144	55,689,595	33,565,000	1,017,000	2,277,376
2	Mar 30, 2026 00:35	3,149	57,292,947	33,616,000	1,018,000	2,396,160
3	Mar 30, 2026 00:20	3,152	64,589,133	34,668,000	0	2,277,376
4	Mar 30, 2026 00:36	3,152	64,921,191	33,658,000	1,019,000	2,396,160
5	Mar 30, 2026 00:30	3,154	61,850,152	33,679,000	1,020,000	2,392,064
6	Mar 30, 2026 00:37	3,155	61,123,518	33,686,000	1,020,000	2,277,376
7	Mar 30, 2026 00:34	3,155	62,969,897	34,700,000	0	2,396,160
8	Mar 30, 2026 00:31	3,158	64,171,223	33,722,000	1,021,000	2,404,352
9	Mar 30, 2026 00:21	3,165	65,274,147	32,822,000	1,989,000	2,396,160
10	Mar 30, 2026 00:20	3,167	63,090,896	32,846,000	1,990,000	2,277,376
11	Mar 30, 2026 00:36	3,167	59,611,907	33,844,000	995,000	2,277,376
12	Mar 30, 2026 00:36	3,167	61,538,636	33,838,000	995,000	2,277,376
13	Mar 30, 2026 00:31	3,167	64,911,280	33,840,000	995,000	2,277,376
14	Mar 30, 2026 00:30	3,167	64,648,526	32,851,000	1,991,000	2,510,848
15	Mar 30, 2026 00:28	3,167	61,465,548	33,847,000	995,000	2,277,376
16	Mar 30, 2026 00:22	3,167	62,306,334	33,844,000	995,000	2,269,184
17	Mar 30, 2026 00:37	3,168	59,498,119	32,854,000	1,991,000	2,400,256
18	Mar 30, 2026 00:33	3,168	62,468,941	32,859,000	1,991,000	2,392,064
19	Mar 30, 2026 00:34	3,168	60,548,593	34,851,000	0	2,404,352
20	Mar 30, 2026 00:32	3,168	62,184,427	34,844,000	0	2,396,160
21	Mar 30, 2026 00:22	3,168	62,371,805	33,850,000	995,000	2,400,256
22	Mar 30, 2026 00:34	3,168	66,735,810	32,861,000	1,991,000	2,277,376
23	Mar 30, 2026 00:24	3,168	67,292,265	34,851,000	0	2,277,376
24	Mar 30, 2026 00:24	3,168	62,157,167	33,857,000	995,000	2,277,376
25	Mar 30, 2026 00:35	3,168	60,497,811	32,859,000	1,991,000	2,277,376
26	Mar 30, 2026 00:30	3,168	61,846,027	33,854,000	995,000	2,392,064
27	Mar 30, 2026 00:30	3,168	61,170,506	32,857,000	1,991,000	2,396,160
28	Mar 30, 2026 00:21	3,168	61,868,111	33,857,000	995,000	2,404,352
29	Mar 30, 2026 00:37	3,168	60,818,130	32,860,000	1,991,000	2,277,376
30	Mar 30, 2026 00:35	3,169	60,626,228	33,862,000	995,000	2,277,376
31	Mar 30, 2026 00:28	3,169	65,989,879	33,865,000	996,000	2,277,376
32	Mar 30, 2026 00:31	3,169	64,491,193	34,861,000	0	2,277,376
33	Mar 30, 2026 00:34	3,169	59,454,173	33,862,000	995,000	2,392,064
34	Mar 30, 2026 00:35	3,170	57,324,787	32,880,000	1,992,000	2,400,256
35	Mar 30, 2026 00:34	3,170	66,813,064	32,881,000	1,992,000	2,277,376
36	Mar 30, 2026 00:33	3,170	65,753,363	33,879,000	996,000	2,277,376
37	Mar 30, 2026 00:26	3,170	65,937,079	33,870,000	996,000	2,404,352
38	Mar 30, 2026 00:32	3,170	59,294,107	33,877,000	996,000	2,277,376
39	Mar 30, 2026 00:26	3,170	58,942,451	34,866,000	0	2,400,256
40	Mar 30, 2026 00:26	3,170	66,521,012	33,876,000	996,000	2,281,472
41	Mar 30, 2026 00:37	3,172	59,366,416	32,898,000	1,993,000	2,277,376
42	Mar 30, 2026 00:30	3,172	56,444,809	32,903,000	1,994,000	2,404,352
43	Mar 30, 2026 00:37	3,173	61,234,420	33,904,000	997,000	2,277,376
44	Mar 30, 2026 00:21	3,173	64,569,904	33,906,000	997,000	2,408,448
45	Mar 30, 2026 00:28	3,173	63,440,068	33,909,000	997,000	2,277,376
46	Mar 30, 2026 00:21	3,174	60,362,959	33,914,000	997,000	2,277,376
47	Mar 30, 2026 00:35	3,175	57,888,981	33,928,000	997,000	2,400,256
48	Mar 30, 2026 00:33	3,176	61,917,014	32,936,000	1,996,000	2,277,376
49	Mar 30, 2026 00:32	3,176	57,869,516	32,942,000	1,996,000	2,277,376
50	Mar 30, 2026 00:24	3,178	58,452,892	32,958,000	1,997,000	2,277,376
51	Mar 30, 2026 00:22	3,179	60,919,850	32,975,000	1,998,000	2,277,376
52	Mar 30, 2026 00:31	3,179	57,857,997	32,976,000	1,998,000	2,277,376
53	Mar 30, 2026 00:30	3,181	61,312,278	32,994,000	1,999,000	2,502,656
54	Mar 30, 2026 00:37	3,181	56,289,645	32,987,000	1,999,000	2,277,376
55	Mar 30, 2026 00:34	3,182	63,076,289	33,998,000	999,000	2,277,376
56	Mar 30, 2026 00:21	3,183	57,833,219	34,016,000	1,000,000	2,277,376
57	Mar 30, 2026 00:35	3,184	56,755,008	34,028,000	1,000,000	2,277,376
58	Mar 30, 2026 00:31	3,185	59,467,543	33,029,000	2,001,000	2,396,160
59	Mar 30, 2026 00:20	3,188	67,903,762	35,065,000	0	2,277,376
60	Mar 30, 2026 00:31	3,223	59,883,619	34,445,000	1,013,000	2,392,064

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