const a = "Omnipotent";
const pos = 3;
"<strong>" + a.substring(0, pos) + "</strong>" + a.substring(pos);
const a = "Omnipotent";
const sub = "Omn"
a.replace(sub, "<strong>" + sub + "</strong>");
--enable-precise-memory-info
flag.
Test case name | Result |
---|---|
substring | |
replace |
Test name | Executions per second |
---|---|
substring | 48809524.0 Ops/sec |
replace | 6737930.0 Ops/sec |
I'll break down the provided benchmark data and explain what's being tested, compared, and its pros and cons.
Benchmark Overview
MeasureThat.net is a website that allows users to create and run JavaScript microbenchmarks. The benchmarking process involves comparing different approaches for a specific task.
Benchmark Definition JSON
The provided Benchmark Definition JSON represents a test case:
{
"Name": "test benchmark 543",
"Description": null,
"Script Preparation Code": null,
"Html Preparation Code": null
}
This JSON is empty, indicating that no script or HTML preparation code is required for this benchmark.
Individual Test Cases
Two test cases are provided:
[
{
"Benchmark Definition": "const a = \"Omnipotent\";\r\nconst pos = 3;\r\n\"<strong>\" + a.substring(0, pos) + \"</strong>\" + a.substring(pos);",
"Test Name": "substring"
},
{
"Benchmark Definition": "const a = \"Omnipotent\";\r\nconst sub = \"Omn\"\r\na.replace(sub, \"<strong>\" + sub + \"</strong>\");",
"Test Name": "replace"
}
]
These test cases compare two approaches for inserting HTML markup around a specific substring in a string:
"substring"
):const a = "Omnipotent";
const pos = 3;
"<> + a.substring(0, pos) + <> + a.substring(pos);"
In this approach, the substring()
method is used to extract two substrings from the original string. The resulting strings are then concatenated with HTML markup (<strong>
) using template literals.
Pros:
Cons:
"replace"
):const a = "Omnipotent";
const sub = "Omn";
a.replace(sub, "<strong>" + sub + "</strong>");
In this approach, the replace()
method is used to replace the specified substring with a new string that includes HTML markup. The original string remains unchanged.
Pros:
Cons:
Library and Special JS Features
No libraries are used in these test cases. However, JavaScript syntax features such as template literals ("<> + ... + <>"
), string concatenation with HTML markup ("<strong> " + str + "</strong>"
), and the replace()
method are utilized.
Alternatives
Other alternatives for inserting HTML markup around a specific substring in a string might include:
indexOf()
and slice()
methodsKeep in mind that these alternatives may have their own trade-offs in terms of performance, readability, and maintainability.