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 02:29	3,146	69,392,485	34,606,000	0	2,396,160
2	Mar 30, 2026 02:34	3,146	60,009,064	34,609,000	0	2,404,352
3	Mar 30, 2026 02:24	3,147	61,161,926	33,604,000	1,018,000	2,404,352
4	Mar 30, 2026 02:22	3,148	61,037,542	33,615,000	1,018,000	2,400,256
5	Mar 30, 2026 02:20	3,149	65,499,665	33,623,000	1,018,000	2,277,376
6	Mar 30, 2026 02:29	3,151	64,655,271	33,637,000	1,019,000	2,396,160
7	Mar 30, 2026 02:24	3,152	61,962,957	33,656,000	1,019,000	2,408,448
8	Mar 30, 2026 02:23	3,153	60,328,394	34,686,000	0	2,400,256
9	Mar 30, 2026 02:21	3,154	60,396,189	34,697,000	0	2,277,376
10	Mar 30, 2026 02:30	3,165	61,250,755	32,828,000	1,989,000	2,277,376
11	Mar 30, 2026 02:27	3,167	61,460,021	33,846,000	995,000	2,400,256
12	Mar 30, 2026 02:26	3,167	56,125,406	32,842,000	1,990,000	2,482,176
13	Mar 30, 2026 02:20	3,168	61,852,257	34,849,000	0	2,400,256
14	Mar 30, 2026 02:20	3,168	67,621,356	32,856,000	1,991,000	2,277,376
15	Mar 30, 2026 02:32	3,168	61,716,711	32,857,000	1,991,000	2,273,280
16	Mar 30, 2026 02:27	3,168	58,312,498	32,860,000	1,991,000	2,277,376
17	Mar 30, 2026 02:32	3,168	62,750,267	33,856,000	995,000	2,396,160
18	Mar 30, 2026 02:23	3,168	59,703,943	33,850,000	995,000	2,277,376
19	Mar 30, 2026 02:22	3,168	60,467,560	33,852,000	995,000	2,277,376
20	Mar 30, 2026 02:21	3,168	63,859,452	34,843,000	0	2,277,376
21	Mar 30, 2026 02:22	3,168	67,976,873	32,859,000	1,991,000	2,277,376
22	Mar 30, 2026 02:21	3,168	66,721,821	33,857,000	995,000	2,392,064
23	Mar 30, 2026 02:30	3,169	63,603,640	32,868,000	1,992,000	2,400,256
24	Mar 30, 2026 02:34	3,169	62,144,654	33,859,000	995,000	2,277,376
25	Mar 30, 2026 02:29	3,169	60,701,662	33,867,000	996,000	2,404,352
26	Mar 30, 2026 02:34	3,169	60,487,570	34,854,000	0	2,400,256
27	Mar 30, 2026 02:29	3,169	66,418,844	32,868,000	1,992,000	2,400,256
28	Mar 30, 2026 02:29	3,169	59,698,532	34,862,000	0	2,400,256
29	Mar 30, 2026 02:28	3,169	68,126,912	33,865,000	996,000	2,277,376
30	Mar 30, 2026 02:22	3,169	66,126,598	32,863,000	1,991,000	2,396,160
31	Mar 30, 2026 02:33	3,169	60,368,929	33,868,000	996,000	2,396,160
32	Mar 30, 2026 02:22	3,169	65,096,260	33,863,000	995,000	2,277,376
33	Mar 30, 2026 02:33	3,170	64,728,181	33,871,000	996,000	2,400,256
34	Mar 30, 2026 02:34	3,170	63,335,040	34,866,000	0	2,277,376
35	Mar 30, 2026 02:33	3,170	66,819,625	32,874,000	1,992,000	2,277,376
36	Mar 30, 2026 02:27	3,170	64,495,716	33,872,000	996,000	2,510,848
37	Mar 30, 2026 02:27	3,170	64,343,021	33,871,000	996,000	2,277,376
38	Mar 30, 2026 02:22	3,170	65,155,510	32,882,000	1,992,000	2,277,376
39	Mar 30, 2026 02:35	3,172	60,449,285	33,870,000	1,026,000	2,277,376
40	Mar 30, 2026 02:35	3,172	62,196,963	34,893,000	0	2,277,376
41	Mar 30, 2026 02:26	3,172	63,185,839	32,897,000	1,993,000	2,404,352
42	Mar 30, 2026 02:20	3,173	60,219,900	32,914,000	1,994,000	2,400,256
43	Mar 30, 2026 02:27	3,174	54,479,518	32,923,000	1,995,000	2,277,376
44	Mar 30, 2026 02:20	3,174	61,297,880	32,923,000	1,995,000	2,396,160
45	Mar 30, 2026 02:35	3,176	61,427,100	32,941,000	1,996,000	2,400,256
46	Mar 30, 2026 02:28	3,176	61,052,361	33,938,000	998,000	2,396,160
47	Mar 30, 2026 02:20	3,176	57,518,484	32,942,000	1,996,000	2,396,160
48	Mar 30, 2026 02:34	3,176	63,026,302	33,936,000	998,000	2,404,352
49	Mar 30, 2026 02:32	3,177	59,130,983	32,947,000	1,996,000	2,277,376
50	Mar 30, 2026 02:28	3,178	56,668,830	33,960,000	998,000	2,396,160
51	Mar 30, 2026 02:34	3,179	62,948,252	33,973,000	999,000	2,273,280
52	Mar 30, 2026 02:23	3,179	55,568,899	33,973,000	999,000	2,277,376
53	Mar 30, 2026 02:30	3,179	59,325,618	33,968,000	999,000	2,277,376
54	Mar 30, 2026 02:26	3,180	58,672,915	32,982,000	1,998,000	2,277,376
55	Mar 30, 2026 02:24	3,182	64,405,911	33,006,000	2,000,000	2,277,376
56	Mar 30, 2026 02:29	3,184	60,408,575	33,024,000	2,001,000	2,486,272
57	Mar 30, 2026 02:27	3,189	55,072,817	33,073,000	2,004,000	2,396,160

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