Benchmark: JSON Parse vs regex

Script Preparation code:

var entries = [{
        "data": "random_string_one",
        "comment": "{\"random_other_field_one\":\"this is a bunch of sample data\",\"random_other_field_two\":\"this is another set of sample data\",\"random_other_field_three\":\"this is another bit of sample data\",\"random_other_field_four\":\"this is another glob of sample data\",\"segregationRequirement\":2}"
    },
    {
        "data": "random_string_one",
        "comment": "{\"random_other_field_one\":\"this is a bunch of sample data\",\"random_other_field_two\":\"this is another set of sample data\",\"random_other_field_three\":\"this is another bit of sample data\",\"random_other_field_four\":\"this is another glob of sample data\",\"segregationRequirement\":221}"
    },
    {
        "data": "random_string_one",
        "comment": "{\"random_other_field_one\":\"this is a bunch of sample data\",\"random_other_field_two\":\"this is another set of sample data\",\"random_other_field_three\":\"this is another bit of sample data\",\"random_other_field_four\":\"this is another glob of sample data\",\"segregationRequirement\":2}"
    },
    {
        "data": "random_string_one",
        "comment": "{\"random_other_field_one\":\"this is a bunch of sample data\",\"random_other_field_two\":\"this is another set of sample data\",\"random_other_field_three\":\"this is another bit of sample data\",\"random_other_field_four\":\"this is another glob of sample data\",\"segregationRequirement\":2}"
    },
    {
        "data": "random_string_one",
        "comment": "{\"random_other_field_one\":\"this is a bunch of sample data\",\"random_other_field_two\":\"this is another set of sample data\",\"random_other_field_three\":\"this is another bit of sample data\",\"random_other_field_four\":\"this is another glob of sample data\",\"segregationRequirement\":221}"
    },
    {
        "data": "random_string_one",
        "comment": "{\"random_other_field_one\":\"this is a bunch of sample data\",\"random_other_field_two\":\"this is another set of sample data\",\"random_other_field_three\":\"this is another bit of sample data\",\"random_other_field_four\":\"this is another glob of sample data\",\"segregationRequirement\":2}"
    },
    {
        "data": "random_string_one",
        "comment": "{\"random_other_field_one\":\"this is a bunch of sample data\",\"random_other_field_two\":\"this is another set of sample data\",\"random_other_field_three\":\"this is another bit of sample data\",\"random_other_field_four\":\"this is another glob of sample data\",\"segregationRequirement\":221}"
    },
    {
        "data": "random_string_one",
        "comment": "{\"random_other_field_one\":\"this is a bunch of sample data\",\"random_other_field_two\":\"this is another set of sample data\",\"random_other_field_three\":\"this is another bit of sample data\",\"random_other_field_four\":\"this is another glob of sample data\",\"segregationRequirement\":2}"
    },
    {
        "data": "random_string_one",
        "comment": "{\"random_other_field_one\":\"this is a bunch of sample data\",\"random_other_field_two\":\"this is another set of sample data\",\"random_other_field_three\":\"this is another bit of sample data\",\"random_other_field_four\":\"this is another glob of sample data\",\"segregationRequirement\":221}"
    },
    {
        "data": "random_string_one",
        "comment": "{\"random_other_field_one\":\"this is a bunch of sample data\",\"random_other_field_two\":\"this is another set of sample data\",\"random_other_field_three\":\"this is another bit of sample data\",\"random_other_field_four\":\"this is another glob of sample data\",\"segregationRequirement\":221}"
    },
    {
        "data": "random_string_one",
        "comment": "{\"random_other_field_one\":\"this is a bunch of sample data\",\"random_other_field_two\":\"this is another set of sample data\",\"random_other_field_three\":\"this is another bit of sample data\",\"random_other_field_four\":\"this is another glob of sample data\",\"segregationRequirement\":2}"
    },
    {
        "data": "random_string_one",
        "comment": "{\"random_other_field_one\":\"this is a bunch of sample data\",\"random_other_field_two\":\"this is another set of sample data\",\"random_other_field_three\":\"this is another bit of sample data\",\"random_other_field_four\":\"this is another glob of sample data\",\"segregationRequirement\":2}"
    },
    {
        "data": "random_string_one",
        "comment": "{\"random_other_field_one\":\"this is a bunch of sample data\",\"random_other_field_two\":\"this is another set of sample data\",\"random_other_field_three\":\"this is another bit of sample data\",\"random_other_field_four\":\"this is another glob of sample data\",\"segregationRequirement\":2}"
    },
    {
        "data": "random_string_one",
        "comment": "{\"random_other_field_one\":\"this is a bunch of sample data\",\"random_other_field_two\":\"this is another set of sample data\",\"random_other_field_three\":\"this is another bit of sample data\",\"random_other_field_four\":\"this is another glob of sample data\",\"segregationRequirement\":221}"
    },
    {
        "data": "random_string_one",
        "comment": "{\"random_other_field_one\":\"this is a bunch of sample data\",\"random_other_field_two\":\"this is another set of sample data\",\"random_other_field_three\":\"this is another bit of sample data\",\"random_other_field_four\":\"this is another glob of sample data\",\"segregationRequirement\":2}"
    }
];

Tests:

JSON
const arr = []; for (const entry of entries) { const value = JSON.parse(entry.comment); arr.push(value.segregationRequirement); }
Regex
const arr = []; const re = /"segregationRequirement":\s*(\d+)[,}]/; for (const entry of entries) { const match = entry.comment.match(re) arr.push(match[1]); }
String search
const arr = []; for (const entry of entries) { const found = entry.comment.includes('"segregationRequirement":2'); arr.push(found); }
indexOf
const arr = []; for (const entry of entries) { const found = entry.comment.indexOf('"segregationRequirement":2') !== -1; arr.push(found); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
JSON
Regex
String search
indexOf

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 7 days ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:132.0) Gecko/20100101 Firefox/132.0

Browser/OS: Firefox 132 on Mac OS X 10.15

View result in a separate tab

Test name	Executions per second
JSON	143872.2 Ops/sec
Regex	734186.4 Ops/sec
String search	456313.1 Ops/sec
indexOf	455953.0 Ops/sec

Autogenerated LLM Summary (model llama3.2:3b, generated one month ago):

LLMs can make mistakes. Check important info.

Related benchmarks:

JSON Parse vs regex (version: 4)

Comparing performance of: JSON vs Regex vs String search vs indexOf

Created: one year ago by: Registered User

Jump to the latest result

JSON

Regex

String search

indexOf

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated one month ago):