Python Benchmark: Replace in string

Looking for a fast way to "Replace in string" in python? Check below to see see which method is the fastest and uses less memory.

Packages

Setup

Runs before the benchmark, and it is not measured. Good place to import libraries and prepare data. Learn more

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import re
compiled = re.compile("Perth")
string = """
Nature and urban life exist in harmony in Perth, 
on Australia's west coast. Here, where the locals 
soak up more sunny days than in any other Australian 
capital city, you can visit nearby Rottnest Island, 
walk in leafy Kings Park and experience Swan Valley's 
vineyards, Aboriginal art, food and history. 
For local culture, wander the nearby city of 
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Code 1

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output = string.replace("Perth", "Brisbane")
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Code 2

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output = re.sub("Perth", "Brisbane", string)
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Code 3

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output = compiled.sub("Brisbane", string)
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Teardown

Runs after the benchmark, and it is not measured. Good place to print out results. Learn more

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print(output)
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Results

Fastest

str.replace

1.83 us

547K op/s

Speed

Benchmark	Runtime	Operations	VS	Visual
str.replace	1.83 us	547K op/s	1×	0.0000018272345501868034
re.sub compiled	2.58 us	388K op/s	1.41×	0.0000025766104711334018
re.sub	6.13 us	163K op/s	3.4×	0.0000061339529533614315

Memory

Benchmark	Peak Memory	Score	VS
re.sub compiled	< 1 KB	13.6	1×
re.sub	< 1 KB	13.2	1×
str.replace	< 1 KB	13.7	1×

Output

str.replace

    Nature and urban life exist in harmony in Brisbane, 
    on Australia's west coast. Here, where the locals 
    soak up more sunny days than in any other Australian 
    capital city, you can visit nearby Rottnest Island, 
    walk in leafy Kings Park and experience Swan Valley's 
    vineyards, Aboriginal art, food and history. 
    For local culture, wander the nearby city of 
    Fremantle's winding portside streets, Brisbane city 
    centre's museum and gallery precinct or peel back 
    the layers of this urban landscape with an Aboriginal guide.
    
    Nature and urban life exist in harmony in Brisbane, 
    on Australia's west coast. Here, where the locals 
    soak up more sunny days than in any other Australian 
    capital city, you can visit nearby Rottnest Island, 
    walk in leafy Kings Park and experience Swan Valley's 
    vineyards, Aboriginal art, food and history. 
    For local culture, wander the nearby city of 
    Fremantle's winding portside streets, Brisbane city 
    centre's museum and gallery precinct or peel back 
    the layers of this urban landscape with an Aboriginal guide.
    
    Nature and urban life exist in harmony in Brisbane, 
    on Australia's west coast. Here, where the locals 
    soak up more sunny days than in any other Australian 
    capital city, you can visit nearby Rottnest Island, 
    walk in leafy Kings Park and experience Swan Valley's 
    vineyards, Aboriginal art, food and history. 
    For local culture, wander the nearby city of 
    Fremantle's winding portside streets, Brisbane city 
    centre's museum and gallery precinct or peel back 
    the layers of this urban landscape with an Aboriginal guide.

re.sub

    Nature and urban life exist in harmony in Brisbane, 
    on Australia's west coast. Here, where the locals 
    soak up more sunny days than in any other Australian 
    capital city, you can visit nearby Rottnest Island, 
    walk in leafy Kings Park and experience Swan Valley's 
    vineyards, Aboriginal art, food and history. 
    For local culture, wander the nearby city of 
    Fremantle's winding portside streets, Brisbane city 
    centre's museum and gallery precinct or peel back 
    the layers of this urban landscape with an Aboriginal guide.
    
    Nature and urban life exist in harmony in Brisbane, 
    on Australia's west coast. Here, where the locals 
    soak up more sunny days than in any other Australian 
    capital city, you can visit nearby Rottnest Island, 
    walk in leafy Kings Park and experience Swan Valley's 
    vineyards, Aboriginal art, food and history. 
    For local culture, wander the nearby city of 
    Fremantle's winding portside streets, Brisbane city 
    centre's museum and gallery precinct or peel back 
    the layers of this urban landscape with an Aboriginal guide.
    
    Nature and urban life exist in harmony in Brisbane, 
    on Australia's west coast. Here, where the locals 
    soak up more sunny days than in any other Australian 
    capital city, you can visit nearby Rottnest Island, 
    walk in leafy Kings Park and experience Swan Valley's 
    vineyards, Aboriginal art, food and history. 
    For local culture, wander the nearby city of 
    Fremantle's winding portside streets, Brisbane city 
    centre's museum and gallery precinct or peel back 
    the layers of this urban landscape with an Aboriginal guide.

re.sub compiled

    Nature and urban life exist in harmony in Brisbane, 
    on Australia's west coast. Here, where the locals 
    soak up more sunny days than in any other Australian 
    capital city, you can visit nearby Rottnest Island, 
    walk in leafy Kings Park and experience Swan Valley's 
    vineyards, Aboriginal art, food and history. 
    For local culture, wander the nearby city of 
    Fremantle's winding portside streets, Brisbane city 
    centre's museum and gallery precinct or peel back 
    the layers of this urban landscape with an Aboriginal guide.
    
    Nature and urban life exist in harmony in Brisbane, 
    on Australia's west coast. Here, where the locals 
    soak up more sunny days than in any other Australian 
    capital city, you can visit nearby Rottnest Island, 
    walk in leafy Kings Park and experience Swan Valley's 
    vineyards, Aboriginal art, food and history. 
    For local culture, wander the nearby city of 
    Fremantle's winding portside streets, Brisbane city 
    centre's museum and gallery precinct or peel back 
    the layers of this urban landscape with an Aboriginal guide.
    
    Nature and urban life exist in harmony in Brisbane, 
    on Australia's west coast. Here, where the locals 
    soak up more sunny days than in any other Australian 
    capital city, you can visit nearby Rottnest Island, 
    walk in leafy Kings Park and experience Swan Valley's 
    vineyards, Aboriginal art, food and history. 
    For local culture, wander the nearby city of 
    Fremantle's winding portside streets, Brisbane city 
    centre's museum and gallery precinct or peel back 
    the layers of this urban landscape with an Aboriginal guide.