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 19:40	3,147	60,617,511	33,604,000	1,018,000	2,408,448
2	Mar 30, 2026 19:39	3,149	65,780,027	34,636,000	0	2,277,376
3	Mar 30, 2026 19:44	3,150	63,950,274	34,645,000	0	2,396,160
4	Mar 30, 2026 19:28	3,150	61,409,327	34,652,000	0	2,277,376
5	Mar 30, 2026 19:27	3,152	60,556,063	34,676,000	0	2,400,256
6	Mar 30, 2026 19:41	3,153	66,216,522	34,684,000	0	2,277,376
7	Mar 30, 2026 19:41	3,154	63,602,364	34,696,000	0	2,277,376
8	Mar 30, 2026 19:41	3,154	69,052,319	32,649,000	2,040,000	2,273,280
9	Mar 30, 2026 19:44	3,155	68,181,547	34,704,000	0	2,277,376
10	Mar 30, 2026 19:37	3,165	60,774,799	32,830,000	1,989,000	2,273,280
11	Mar 30, 2026 19:40	3,167	65,968,854	32,842,000	1,990,000	2,277,376
12	Mar 30, 2026 19:41	3,167	63,282,233	33,846,000	995,000	2,400,256
13	Mar 30, 2026 19:33	3,167	70,895,084	33,846,000	995,000	2,277,376
14	Mar 30, 2026 19:43	3,167	63,669,103	32,843,000	1,990,000	2,404,352
15	Mar 30, 2026 19:41	3,168	64,413,363	33,854,000	995,000	2,277,376
16	Mar 30, 2026 19:36	3,168	68,254,323	32,857,000	1,991,000	2,400,256
17	Mar 30, 2026 19:38	3,168	60,546,926	33,851,000	995,000	2,408,448
18	Mar 30, 2026 19:36	3,168	63,888,266	33,852,000	995,000	2,277,376
19	Mar 30, 2026 19:35	3,168	67,463,029	33,850,000	995,000	2,392,064
20	Mar 30, 2026 19:28	3,168	60,771,576	33,856,000	995,000	2,404,352
21	Mar 30, 2026 19:41	3,169	63,996,673	32,864,000	1,991,000	2,277,376
22	Mar 30, 2026 19:37	3,169	64,712,603	32,867,000	1,991,000	2,277,376
23	Mar 30, 2026 19:43	3,169	63,161,674	33,860,000	995,000	2,277,376
24	Mar 30, 2026 19:38	3,170	70,575,268	32,881,000	1,992,000	2,277,376
25	Mar 30, 2026 19:46	3,170	64,863,532	32,875,000	1,992,000	2,396,160
26	Mar 30, 2026 19:28	3,170	63,898,347	33,876,000	996,000	2,408,448
27	Mar 30, 2026 19:46	3,170	61,259,878	33,871,000	996,000	2,404,352
28	Mar 30, 2026 19:35	3,171	59,031,907	33,885,000	996,000	2,400,256
29	Mar 30, 2026 19:45	3,171	62,085,136	32,891,000	1,993,000	2,277,376
30	Mar 30, 2026 19:31	3,171	63,227,238	32,884,000	1,993,000	2,277,376
31	Mar 30, 2026 19:40	3,171	57,713,602	32,893,000	1,993,000	2,277,376
32	Mar 30, 2026 19:37	3,172	57,199,495	33,891,000	996,000	2,277,376
33	Mar 30, 2026 19:42	3,172	55,711,948	33,866,000	1,026,000	2,277,376
34	Mar 30, 2026 19:42	3,173	63,434,731	33,909,000	997,000	2,396,160
35	Mar 30, 2026 19:31	3,175	60,371,938	33,932,000	998,000	2,277,376
36	Mar 30, 2026 19:45	3,175	58,259,770	32,928,000	1,995,000	2,404,352
37	Mar 30, 2026 19:35	3,175	59,779,493	32,932,000	1,995,000	2,400,256
38	Mar 30, 2026 19:42	3,175	59,816,540	32,926,000	1,995,000	2,396,160
39	Mar 30, 2026 19:46	3,176	57,842,276	32,938,000	1,996,000	2,396,160
40	Mar 30, 2026 19:45	3,177	63,729,678	33,952,000	998,000	2,277,376
41	Mar 30, 2026 19:31	3,177	56,355,337	32,953,000	1,997,000	2,277,376
42	Mar 30, 2026 19:31	3,178	63,547,964	33,959,000	998,000	2,277,376
43	Mar 30, 2026 19:27	3,178	61,469,984	32,960,000	1,997,000	2,277,376
44	Mar 30, 2026 19:38	3,179	60,778,431	32,969,000	1,998,000	2,404,352
45	Mar 30, 2026 19:33	3,179	58,332,646	33,972,000	999,000	2,404,352
46	Mar 30, 2026 19:31	3,179	60,292,365	32,969,000	1,998,000	2,277,376
47	Mar 30, 2026 19:44	3,179	59,212,518	32,970,000	1,998,000	2,277,376
48	Mar 30, 2026 19:39	3,180	63,809,267	32,980,000	1,998,000	2,277,376
49	Mar 30, 2026 19:36	3,180	60,320,179	33,979,000	999,000	2,277,376
50	Mar 30, 2026 19:39	3,181	57,533,651	33,987,000	999,000	2,400,256
51	Mar 30, 2026 19:33	3,181	58,104,164	32,994,000	1,999,000	2,396,160
52	Mar 30, 2026 19:43	3,183	56,224,726	34,018,000	1,000,000	2,273,280
53	Mar 30, 2026 19:27	3,184	63,276,118	34,028,000	1,000,000	2,277,376
54	Mar 30, 2026 19:31	3,186	63,228,419	34,045,000	1,001,000	2,400,256

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