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 02:12	3,150	61,963,090	33,628,000	1,019,000	2,400,256
2	Mar 30, 2026 02:14	3,150	62,540,068	34,653,000	0	2,392,064
3	Mar 30, 2026 02:05	3,152	61,083,227	34,669,000	0	2,277,376
4	Mar 30, 2026 02:13	3,152	64,207,610	34,669,000	0	2,396,160
5	Mar 30, 2026 02:12	3,153	65,036,756	34,688,000	0	2,277,376
6	Mar 30, 2026 02:02	3,154	64,207,847	34,693,000	0	2,277,376
7	Mar 30, 2026 02:11	3,155	59,487,571	34,705,000	0	2,277,376
8	Mar 30, 2026 02:10	3,155	59,648,145	33,689,000	1,020,000	2,404,352
9	Mar 30, 2026 02:10	3,156	64,505,906	33,697,000	1,021,000	2,400,256
10	Mar 30, 2026 02:02	3,163	61,226,008	33,803,000	994,000	2,404,352
11	Mar 30, 2026 02:14	3,164	60,242,436	33,809,000	994,000	2,400,256
12	Mar 30, 2026 02:01	3,166	62,017,832	32,835,000	1,990,000	2,396,160
13	Mar 30, 2026 02:11	3,166	60,757,299	32,838,000	1,990,000	2,277,376
14	Mar 30, 2026 02:04	3,166	60,503,178	33,829,000	994,000	2,408,448
15	Mar 30, 2026 02:09	3,166	61,232,019	33,835,000	995,000	2,277,376
16	Mar 30, 2026 02:13	3,167	58,188,491	33,838,000	995,000	2,277,376
17	Mar 30, 2026 02:11	3,167	59,261,769	32,844,000	1,990,000	2,400,256
18	Mar 30, 2026 02:07	3,167	63,454,658	33,838,000	995,000	2,404,352
19	Mar 30, 2026 02:14	3,167	63,018,054	32,849,000	1,990,000	2,486,272
20	Mar 30, 2026 02:02	3,167	69,532,589	33,843,000	995,000	2,400,256
21	Mar 30, 2026 02:01	3,168	67,202,149	32,853,000	1,991,000	2,277,376
22	Mar 30, 2026 02:07	3,168	62,533,714	34,843,000	0	2,277,376
23	Mar 30, 2026 02:13	3,168	65,571,346	32,853,000	1,991,000	2,277,376
24	Mar 30, 2026 02:02	3,168	61,640,242	33,857,000	995,000	2,400,256
25	Mar 30, 2026 02:11	3,168	64,585,847	32,857,000	1,991,000	2,277,376
26	Mar 30, 2026 02:05	3,168	65,301,715	33,858,000	995,000	2,396,160
27	Mar 30, 2026 02:10	3,168	61,281,116	33,824,000	1,024,000	2,392,064
28	Mar 30, 2026 02:04	3,169	69,056,943	32,864,000	1,991,000	2,400,256
29	Mar 30, 2026 02:13	3,169	62,075,354	32,871,000	1,992,000	2,277,376
30	Mar 30, 2026 02:03	3,169	59,861,659	32,870,000	1,992,000	2,277,376
31	Mar 30, 2026 02:04	3,169	65,259,255	33,863,000	995,000	2,277,376
32	Mar 30, 2026 02:09	3,170	68,535,374	32,874,000	1,992,000	2,396,160
33	Mar 30, 2026 02:10	3,170	61,127,200	33,870,000	996,000	2,277,376
34	Mar 30, 2026 02:08	3,170	62,937,265	33,870,000	996,000	2,277,376
35	Mar 30, 2026 02:04	3,170	60,354,062	32,873,000	1,992,000	2,400,256
36	Mar 30, 2026 02:10	3,170	65,988,171	32,874,000	1,992,000	2,277,376
37	Mar 30, 2026 02:14	3,170	59,555,823	33,878,000	996,000	2,277,376
38	Mar 30, 2026 02:09	3,170	61,033,745	32,876,000	1,992,000	2,277,376
39	Mar 30, 2026 02:04	3,171	58,526,714	33,886,000	996,000	2,404,352
40	Mar 30, 2026 02:11	3,173	65,830,642	32,907,000	1,994,000	2,396,160
41	Mar 30, 2026 02:07	3,173	62,729,213	32,904,000	1,994,000	2,404,352
42	Mar 30, 2026 02:03	3,174	60,892,719	33,917,000	997,000	2,277,376
43	Mar 30, 2026 02:04	3,174	56,108,261	33,922,000	997,000	2,519,040
44	Mar 30, 2026 02:12	3,174	58,471,492	32,917,000	1,995,000	2,277,376
45	Mar 30, 2026 02:05	3,174	66,006,383	32,917,000	1,995,000	2,277,376
46	Mar 30, 2026 02:03	3,175	61,981,693	32,932,000	1,995,000	2,277,376
47	Mar 30, 2026 02:14	3,175	60,561,465	33,925,000	997,000	2,277,376
48	Mar 30, 2026 02:02	3,175	56,886,432	33,927,000	997,000	2,277,376
49	Mar 30, 2026 02:13	3,175	56,756,755	33,924,000	997,000	2,400,256
50	Mar 30, 2026 02:02	3,176	60,683,201	33,940,000	998,000	2,277,376
51	Mar 30, 2026 02:09	3,177	62,467,757	33,954,000	998,000	2,404,352
52	Mar 30, 2026 02:11	3,178	67,514,441	33,957,000	998,000	2,277,376
53	Mar 30, 2026 02:13	3,180	58,054,048	32,980,000	1,998,000	2,277,376
54	Mar 30, 2026 02:01	3,181	58,060,372	32,997,000	1,999,000	2,277,376
55	Mar 30, 2026 02:14	3,183	65,726,394	33,010,000	2,000,000	2,277,376
56	Mar 30, 2026 02:08	3,185	59,620,654	34,033,000	1,000,000	2,519,040
57	Mar 30, 2026 02:09	3,186	62,229,070	34,047,000	1,001,000	2,277,376
58	Mar 30, 2026 02:08	3,187	59,098,172	33,054,000	2,003,000	2,277,376
59	Mar 30, 2026 02:10	3,187	61,045,816	34,054,000	1,001,000	2,396,160
60	Mar 30, 2026 02:09	3,194	61,129,474	33,125,000	2,007,000	2,277,376

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