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 03:43	3,145	56,962,712	33,583,000	1,017,000	2,277,376
2	Mar 30, 2026 03:47	3,145	64,593,426	33,579,000	1,017,000	2,404,352
3	Mar 30, 2026 03:34	3,150	60,432,285	33,630,000	1,019,000	2,396,160
4	Mar 30, 2026 03:47	3,150	63,247,530	33,630,000	1,019,000	2,277,376
5	Mar 30, 2026 03:43	3,151	64,994,534	33,637,000	1,019,000	2,400,256
6	Mar 30, 2026 03:49	3,151	63,555,083	34,661,000	0	2,277,376
7	Mar 30, 2026 03:36	3,153	61,873,994	33,667,000	1,020,000	2,400,256
8	Mar 30, 2026 03:41	3,154	58,434,050	33,675,000	1,020,000	2,400,256
9	Mar 30, 2026 03:44	3,154	64,558,346	33,670,000	1,020,000	2,404,352
10	Mar 30, 2026 03:47	3,154	64,127,421	33,675,000	1,020,000	2,396,160
11	Mar 30, 2026 03:48	3,156	65,252,294	34,714,000	0	2,392,064
12	Mar 30, 2026 03:36	3,163	61,345,797	33,796,000	994,000	2,277,376
13	Mar 30, 2026 03:48	3,165	59,935,638	33,826,000	994,000	2,277,376
14	Mar 30, 2026 03:38	3,167	64,829,891	34,835,000	0	2,277,376
15	Mar 30, 2026 03:38	3,167	59,449,688	34,836,000	0	2,400,256
16	Mar 30, 2026 03:48	3,167	70,090,787	32,851,000	1,991,000	2,277,376
17	Mar 30, 2026 03:36	3,167	61,650,889	32,846,000	1,990,000	2,277,376
18	Mar 30, 2026 03:44	3,168	60,882,856	33,857,000	995,000	2,277,376
19	Mar 30, 2026 03:43	3,168	64,860,371	33,851,000	995,000	2,277,376
20	Mar 30, 2026 03:42	3,168	67,195,142	32,861,000	1,991,000	2,400,256
21	Mar 30, 2026 03:42	3,168	63,422,576	33,857,000	995,000	2,277,376
22	Mar 30, 2026 03:42	3,168	66,733,511	32,860,000	1,991,000	2,277,376
23	Mar 30, 2026 03:41	3,168	61,965,183	33,855,000	995,000	2,277,376
24	Mar 30, 2026 03:36	3,168	63,539,612	33,857,000	995,000	2,277,376
25	Mar 30, 2026 03:45	3,169	59,108,673	34,857,000	0	2,277,376
26	Mar 30, 2026 03:45	3,169	68,918,085	34,858,000	0	2,392,064
27	Mar 30, 2026 03:46	3,169	64,364,143	32,866,000	1,991,000	2,277,376
28	Mar 30, 2026 03:47	3,169	64,579,980	33,866,000	996,000	2,277,376
29	Mar 30, 2026 03:34	3,169	63,835,739	33,864,000	996,000	2,273,280
30	Mar 30, 2026 03:49	3,169	58,553,100	32,866,000	1,991,000	2,400,256
31	Mar 30, 2026 03:48	3,169	63,832,094	34,855,000	0	2,396,160
32	Mar 30, 2026 03:38	3,169	66,225,369	32,869,000	1,992,000	2,396,160
33	Mar 30, 2026 03:48	3,170	61,647,779	33,875,000	996,000	2,277,376
34	Mar 30, 2026 03:41	3,170	60,475,605	33,871,000	996,000	2,277,376
35	Mar 30, 2026 03:35	3,171	59,317,482	32,885,000	1,993,000	2,277,376
36	Mar 30, 2026 03:47	3,171	64,974,733	32,885,000	1,993,000	2,277,376
37	Mar 30, 2026 03:34	3,171	61,396,023	32,889,000	1,993,000	2,277,376
38	Mar 30, 2026 03:36	3,173	57,716,549	33,907,000	997,000	2,277,376
39	Mar 30, 2026 03:42	3,173	58,037,362	33,905,000	997,000	2,404,352
40	Mar 30, 2026 03:35	3,175	63,567,443	33,925,000	997,000	2,277,376
41	Mar 30, 2026 03:36	3,175	59,728,530	32,934,000	1,996,000	2,277,376
42	Mar 30, 2026 03:45	3,175	60,245,153	32,928,000	1,995,000	2,408,448
43	Mar 30, 2026 03:46	3,176	57,729,461	32,941,000	1,996,000	2,396,160
44	Mar 30, 2026 03:42	3,176	57,554,906	33,943,000	998,000	2,408,448
45	Mar 30, 2026 03:41	3,177	57,091,978	32,951,000	1,997,000	2,277,376
46	Mar 30, 2026 03:44	3,177	62,020,238	33,954,000	998,000	2,498,560
47	Mar 30, 2026 03:45	3,177	59,261,687	33,953,000	998,000	2,400,256
48	Mar 30, 2026 03:44	3,177	60,803,368	32,948,000	1,996,000	2,277,376
49	Mar 30, 2026 03:44	3,178	61,667,296	32,966,000	1,997,000	2,408,448
50	Mar 30, 2026 03:45	3,180	63,100,931	33,981,000	999,000	2,277,376
51	Mar 30, 2026 03:47	3,181	64,967,686	32,994,000	1,999,000	2,277,376
52	Mar 30, 2026 03:44	3,181	56,207,162	33,993,000	999,000	2,277,376
53	Mar 30, 2026 03:41	3,182	60,899,023	33,000,000	2,000,000	2,277,376
54	Mar 30, 2026 03:46	3,184	56,351,117	33,020,000	2,001,000	2,392,064
55	Mar 30, 2026 03:42	3,184	58,307,338	34,019,000	1,000,000	2,404,352
56	Mar 30, 2026 03:49	3,185	60,195,610	33,033,000	2,002,000	2,400,256
57	Mar 30, 2026 03:35	3,185	64,076,332	33,035,000	2,002,000	2,400,256
58	Mar 30, 2026 03:41	3,185	61,960,381	34,035,000	1,001,000	2,396,160
59	Mar 30, 2026 03:48	3,188	61,927,759	33,060,000	2,003,000	2,482,176
60	Mar 30, 2026 03:45	3,188	59,157,189	33,062,000	2,003,000	2,392,064

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