Performance profiling basics in Ruby - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to require the Ruby profiler library.

Ruby

require '[1]'

Drag options to blanks, or click blank then click option'

Aperformance

Bprofiler

Cprofile

Dbenchmark

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'profiler' instead of 'profile' causes a load error.

Using 'benchmark' is for timing, not profiling.

The Ruby standard library for profiling code is called profile. You need to require it to use profiling features.

2fill in blank

medium

Complete the code to start profiling a block of code.

Ruby

[1] do
  sleep(1)
end

Drag options to blanks, or click blank then click option'

AProfile.profile

BProfiler.profile

CProfile do

Dprofile do

Attempts:

3 left

💡 Hint

Common Mistakes

Using Profiler instead of Profile causes an error.

Omitting .profile or using lowercase module name causes errors.

Not using 'do' to start the block causes syntax errors.

The Profile.profile method is used with a block to profile the code inside. It must be capitalized Profile and lowercase profile method, used with do to start the block. This convenience method handles start, run block, stop, and print_profile automatically.

3fill in blank

hard

Fix the error in the code to correctly profile a method execution.

Ruby

require 'profile'

def slow_method
  sleep(2)
end

[1]

Drag options to blanks, or click blank then click option'

AProfile.profile { slow_method }

BProfile.profile

CProfile.profile {

DProfile.profile do

Attempts:

3 left

💡 Hint

Common Mistakes

Calling Profile.profile slow_method without a block causes an error.

Incomplete block syntax like missing } or end causes syntax errors.

The Profile.profile method expects a block. You must pass the method call inside a block using curly braces { slow_method } or do...end.

4fill in blank

hard

Fill both blanks to create a hash that stores method names and their execution times.

Ruby

times = { [1] => 1.2, [2] => 0.5 }

Drag options to blanks, or click blank then click option'

A:slow_method

B:fast_method

C:average_method

D:quick_method

Attempts:

3 left

💡 Hint

Common Mistakes

Using strings instead of symbols for keys.

Mixing unrelated method names and times.

We use symbols as keys to represent method names. Here, :slow_method and :fast_method are used as keys with their execution times as values.

5fill in blank

hard

Fill all three blanks to filter and print methods with execution time greater than 1 second.

Ruby

times.select { |[1], [2]| [2] [3] 1 }.each do |method, time|
  puts "Method: #{method}, Time: #{time}s"
end

Drag options to blanks, or click blank then click option'

Amethod

Btime

C>

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping the block variables causes wrong filtering.

Using '<' instead of '>' filters the wrong methods.

The block variables are method and time. We filter with time > 1 to get methods taking more than 1 second.