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 06:07	3,147	72,378,343	33,601,000	1,018,000	2,277,376
2	Mar 30, 2026 06:02	3,151	60,181,092	33,644,000	1,019,000	2,277,376
3	Mar 30, 2026 06:05	3,152	62,720,123	34,677,000	0	2,400,256
4	Mar 30, 2026 06:12	3,153	66,415,809	34,688,000	0	2,400,256
5	Mar 30, 2026 06:07	3,156	63,621,886	33,696,000	1,021,000	2,396,160
6	Mar 30, 2026 06:12	3,158	61,939,234	34,739,000	0	2,404,352
7	Mar 30, 2026 06:09	3,164	63,493,318	32,812,000	1,988,000	2,392,064
8	Mar 30, 2026 05:59	3,165	61,389,053	34,816,000	0	2,273,280
9	Mar 30, 2026 06:12	3,166	68,906,058	33,835,000	995,000	2,277,376
10	Mar 30, 2026 06:10	3,167	65,063,520	33,844,000	995,000	2,387,968
11	Mar 30, 2026 06:03	3,167	63,234,084	32,851,000	1,991,000	2,396,160
12	Mar 30, 2026 06:02	3,167	59,553,280	34,837,000	0	2,404,352
13	Mar 30, 2026 06:11	3,168	63,579,572	33,851,000	995,000	2,392,064
14	Mar 30, 2026 06:10	3,168	63,884,321	32,856,000	1,991,000	2,277,376
15	Mar 30, 2026 06:10	3,168	64,010,688	33,852,000	995,000	2,277,376
16	Mar 30, 2026 06:09	3,168	65,086,096	32,860,000	1,991,000	2,277,376
17	Mar 30, 2026 06:12	3,168	60,280,374	32,859,000	1,991,000	2,277,376
18	Mar 30, 2026 06:06	3,168	61,150,874	33,857,000	995,000	2,277,376
19	Mar 30, 2026 06:06	3,168	65,184,325	32,855,000	1,991,000	2,277,376
20	Mar 30, 2026 05:59	3,168	65,690,984	33,849,000	995,000	2,494,464
21	Mar 30, 2026 06:01	3,168	63,171,483	32,853,000	1,991,000	2,277,376
22	Mar 30, 2026 06:03	3,168	62,986,300	33,854,000	995,000	2,277,376
23	Mar 30, 2026 06:02	3,168	61,163,962	33,853,000	995,000	2,277,376
24	Mar 30, 2026 06:08	3,169	65,083,248	34,856,000	0	2,396,160
25	Mar 30, 2026 06:08	3,169	61,888,007	32,863,000	1,991,000	2,277,376
26	Mar 30, 2026 06:09	3,169	61,341,442	33,863,000	995,000	2,277,376
27	Mar 30, 2026 06:03	3,170	63,063,460	32,879,000	1,992,000	2,277,376
28	Mar 30, 2026 06:05	3,170	66,344,755	32,873,000	1,992,000	2,273,280
29	Mar 30, 2026 06:02	3,170	59,678,925	32,874,000	1,992,000	2,396,160
30	Mar 30, 2026 06:04	3,170	59,114,867	32,875,000	1,992,000	2,277,376
31	Mar 30, 2026 06:05	3,171	67,336,497	33,882,000	996,000	2,277,376
32	Mar 30, 2026 06:04	3,171	65,856,714	33,886,000	996,000	2,277,376
33	Mar 30, 2026 06:11	3,171	55,260,766	33,883,000	996,000	2,400,256
34	Mar 30, 2026 06:07	3,172	60,082,181	33,868,000	1,026,000	2,404,352
35	Mar 30, 2026 06:08	3,172	63,288,662	32,898,000	1,993,000	2,277,376
36	Mar 30, 2026 06:06	3,173	68,708,712	32,908,000	1,994,000	2,396,160
37	Mar 30, 2026 06:05	3,173	59,690,573	34,905,000	0	2,277,376
38	Mar 30, 2026 06:07	3,174	61,190,323	33,922,000	997,000	2,404,352
39	Mar 30, 2026 06:09	3,175	57,594,621	32,925,000	1,995,000	2,277,376
40	Mar 30, 2026 06:12	3,175	60,117,465	32,926,000	1,995,000	2,277,376
41	Mar 30, 2026 06:09	3,176	58,109,262	33,941,000	998,000	2,400,256
42	Mar 30, 2026 06:10	3,176	59,547,345	33,934,000	998,000	2,396,160
43	Mar 30, 2026 05:59	3,177	65,113,623	32,952,000	1,997,000	2,277,376
44	Mar 30, 2026 06:04	3,177	56,466,302	32,952,000	1,997,000	2,396,160
45	Mar 30, 2026 06:01	3,177	57,516,596	33,954,000	998,000	2,277,376
46	Mar 30, 2026 06:04	3,178	57,918,729	32,966,000	1,997,000	2,473,984
47	Mar 30, 2026 06:12	3,179	62,473,743	33,966,000	999,000	2,277,376
48	Mar 30, 2026 06:10	3,180	56,278,102	33,978,000	999,000	2,277,376
49	Mar 30, 2026 06:02	3,180	61,719,297	32,984,000	1,999,000	2,277,376
50	Mar 30, 2026 06:07	3,180	61,567,621	32,985,000	1,999,000	2,277,376
51	Mar 30, 2026 06:01	3,181	57,768,318	33,993,000	999,000	2,277,376
52	Mar 30, 2026 06:02	3,181	56,406,058	33,991,000	999,000	2,510,848
53	Mar 30, 2026 06:09	3,181	68,903,791	32,996,000	1,999,000	2,277,376
54	Mar 30, 2026 06:07	3,183	55,621,422	33,011,000	2,000,000	2,277,376
55	Mar 30, 2026 06:05	3,183	56,590,939	33,010,000	2,000,000	2,482,176
56	Mar 30, 2026 06:04	3,183	65,911,444	33,010,000	2,000,000	2,277,376
57	Mar 30, 2026 06:11	3,184	58,780,410	33,019,000	2,001,000	2,400,256
58	Mar 30, 2026 06:04	3,188	64,852,232	33,062,000	2,003,000	2,396,160
59	Mar 30, 2026 06:10	3,190	66,090,253	33,083,000	2,005,000	2,387,968
60	Mar 30, 2026 06:05	3,192	55,884,826	33,101,000	2,006,000	2,400,256

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