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@codeflash-ai codeflash-ai bot commented Nov 11, 2025

📄 36% (0.36x) speedup for extract_packages_from_pip_install_suggestion in marimo/_runtime/packages/import_error_extractors.py

⏱️ Runtime : 817 microseconds 602 microseconds (best of 161 runs)

📝 Explanation and details

The optimization achieves a 35% speedup by precompiling all regular expressions at module load time instead of compiling them on every function call.

Key changes:

  • Precompiled regex patterns: The three quoted_patterns, individual_quoted_pattern, and unquoted_pattern are now compiled once as module-level constants (_quoted_patterns, _individual_quoted_pattern, _unquoted_pattern) with re.IGNORECASE flags baked in.
  • Direct pattern.search() calls: Instead of re.search(pattern, message, re.IGNORECASE), the code now calls pattern.search(message) on precompiled pattern objects.

Why this is faster:
In Python, re.search() with a string pattern must compile the regex every time it's called. The line profiler shows the original code spent significant time in regex compilation (25.6% + 6.2% + 16.3% = 48.1% of total time on the three re.search() calls). Precompiled patterns eliminate this overhead entirely, as regex compilation happens only once at import time.

Performance impact:
The optimization is most effective for:

  • Frequent calls: Test cases show 30-170% speedups, with the biggest gains when patterns don't match (like test_no_pip_install_present at 168% faster)
  • Complex patterns: The quoted patterns with multiple alternatives benefit most from precompilation
  • Large-scale scenarios: Even with 100+ packages, the optimization maintains 3-11% improvements

The optimization preserves all functionality while providing consistent performance gains across all test scenarios, making it particularly valuable if this function is called frequently during import error handling.

Correctness verification report:

Test Status
⚙️ Existing Unit Tests 20 Passed
🌀 Generated Regression Tests 82 Passed
⏪ Replay Tests 🔘 None Found
🔎 Concolic Coverage Tests 1 Passed
📊 Tests Coverage 100.0%
⚙️ Existing Unit Tests and Runtime
Test File::Test Function Original ⏱️ Optimized ⏱️ Speedup
_runtime/packages/test_import_error_extractors.py::test_extract_packages_from_pip_install_suggestion 93.0μs 58.8μs 58.0%✅
🌀 Generated Regression Tests and Runtime

import random # used for generating large test cases

function to test

(copied from above)

import re
import string # used for generating large test cases

imports

import pytest # used for our unit tests
from marimo._runtime.packages.import_error_extractors import
extract_packages_from_pip_install_suggestion

unit tests

1. Basic Test Cases

def test_backtick_quoted_command_single_package():
# Should extract single package from backticked pip install
msg = "Try running pip install foo to install the missing package."
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 4.95μs -> 3.54μs (40.1% faster)

def test_backtick_quoted_command_multiple_packages():
# Should extract multiple packages from backticked pip install
msg = "Try running pip install foo bar to install the missing packages."
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 5.40μs -> 4.02μs (34.3% faster)

def test_double_quoted_command_single_package():
# Should extract single package from double-quoted pip install
msg = 'Try running "pip install foo" to install the missing package.'
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 5.74μs -> 3.62μs (58.4% faster)

def test_double_quoted_command_multiple_packages_with_flags():
# Should extract multiple packages and skip flags
msg = 'Try running "pip install --upgrade foo bar" to install the missing packages.'
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 6.54μs -> 4.45μs (47.1% faster)

def test_single_quoted_command_multiple_packages_with_flags_and_duplicates():
# Should extract multiple packages, skip flags, and ignore duplicates
msg = "Try running 'pip install foo bar --upgrade foo' to install the missing packages."
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 7.33μs -> 4.84μs (51.6% faster)

def test_quoted_command_with_extras():
# Should extract package with extras
msg = "Try running pip install foo[extra1,extra2] to install the missing package."
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 5.00μs -> 3.46μs (44.7% faster)

def test_quoted_command_with_quoted_package():
# Should strip quotes from package name
msg = 'Try running "pip install 'foo'" to install the missing package.'
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 6.03μs -> 4.07μs (48.3% faster)

def test_quoted_command_with_mixed_quotes():
# Should handle package names quoted inside the command
msg = "pip install \"foo\" 'bar'"
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 5.56μs -> 4.36μs (27.6% faster)

def test_individual_quoted_package():
# Should extract package from pip install "foo" (not command quoted)
msg = 'To fix, run: pip install "foo"'
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 5.94μs -> 2.95μs (101% faster)

def test_unquoted_command_single_package():
# Should extract package from unquoted pip install
msg = "To fix, run: pip install foo"
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 6.84μs -> 3.78μs (81.0% faster)

def test_unquoted_command_with_extras():
# Should extract package with extras from unquoted pip install
msg = "Try pip install foo[extra1,extra2]"
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 7.11μs -> 3.75μs (89.8% faster)

def test_unquoted_command_multiple_packages_only_first():
# Should only extract the first package from unquoted pip install
msg = "Try pip install foo bar"
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 6.55μs -> 3.29μs (99.1% faster)

def test_case_insensitivity():
# Should match pip install regardless of case
msg = "Try running 'PIP INSTALL foo'"
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 6.41μs -> 4.15μs (54.3% faster)

2. Edge Test Cases

def test_no_pip_install_present():
# Should return None if no pip install is present
msg = "No suggestion here."
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 4.97μs -> 1.85μs (168% faster)

def test_pip_install_with_only_flags():
# Should return None if only flags are present
msg = "Try pip install --upgrade"
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 9.20μs -> 5.91μs (55.7% faster)

def test_pip_install_with_flag_before_package():
# Should skip flags before package
msg = "Try pip install --upgrade foo"
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 5.50μs -> 4.09μs (34.6% faster)

def test_pip_install_with_flag_after_package():
# Should skip flags after package
msg = "Try pip install foo --upgrade"
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 5.22μs -> 3.90μs (33.9% faster)

def test_pip_install_with_flag_between_packages():
# Should skip flags between packages
msg = "Try pip install foo --upgrade bar"
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 5.74μs -> 4.22μs (36.0% faster)

def test_pip_install_with_duplicate_packages():
# Should only return each package once
msg = "Try pip install foo foo bar bar"
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 6.02μs -> 4.54μs (32.5% faster)

def test_pip_install_with_package_with_dash_and_dot():
# Should handle packages with dashes and dots
msg = "Try pip install foo-bar foo.bar"
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 5.30μs -> 3.85μs (37.8% faster)

def test_pip_install_with_package_with_underscore():
# Should handle packages with underscores
msg = "Try pip install foo_bar"
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 4.70μs -> 3.36μs (40.0% faster)

def test_pip_install_with_version_specifier():
# Should treat version specifier as part of package name (since not handled)
msg = "Try pip install foo==1.2.3"
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 4.92μs -> 3.35μs (46.8% faster)

def test_pip_install_with_extra_spaces():
# Should handle extra spaces between words
msg = "Try pip install foo bar "
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 5.27μs -> 3.98μs (32.3% faster)

def test_pip_install_with_leading_and_trailing_spaces():
# Should handle leading/trailing spaces in the quoted command
msg = "Try pip install foo bar "
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 5.32μs -> 3.91μs (36.0% faster)

def test_pip_install_with_newline_in_command():
# Should not match if pip install is split by newline in quoted command
msg = "Try pip install\nfoo"
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 4.90μs -> 3.45μs (42.1% faster)

def test_pip_install_with_non_ascii_package():
# Should handle non-ascii package names (allowed by regex)
msg = "Try pip install café"
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 5.30μs -> 3.94μs (34.7% faster)

def test_pip_install_with_brackets_in_package():
# Should handle brackets in package name (extras)
msg = "Try pip install foo[extra]"
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 4.83μs -> 3.49μs (38.3% faster)

def test_pip_install_with_no_package_after_command():
# Should return None if no package is present after pip install
msg = "Try running pip install"
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 6.13μs -> 2.68μs (129% faster)

def test_multiple_pip_install_commands_only_first_matches():
# Should only extract from the first matching quoted pattern
msg = "Try pip install foo or 'pip install bar'"
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 5.01μs -> 3.54μs (41.7% faster)

def test_pip_install_with_comments_inside_command():
# Should treat comment as part of package name (since not handled)
msg = "Try pip install foo # comment"
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 5.92μs -> 4.43μs (33.6% faster)

def test_pip_install_with_mixed_case_flags():
# Should skip flags regardless of case
msg = "Try pip install --UPGRADE foo"
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 5.28μs -> 3.98μs (32.7% faster)

def test_pip_install_with_package_name_starting_with_dash():
# Should not treat as package (should skip)
msg = "Try pip install -foo bar"
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 5.21μs -> 3.79μs (37.7% faster)

def test_pip_install_with_package_name_that_is_flag():
# Should not treat flags as packages
msg = "Try pip install --foo --bar"
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 9.78μs -> 6.19μs (58.1% faster)

def test_pip_install_with_package_name_containing_space():
# Should treat as two packages (since split on space)
msg = "Try pip install foo bar baz"
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 5.48μs -> 4.24μs (29.2% faster)

def test_pip_install_with_package_name_containing_quote():
# Should strip quotes from package name
msg = "Try pip install 'foo' \"bar\""
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 5.65μs -> 4.25μs (32.9% faster)

def test_pip_install_with_package_name_containing_unicode():
# Should handle unicode package names
msg = "Try pip install ünicode"
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 5.34μs -> 3.82μs (39.7% faster)

def test_pip_install_with_multiple_quoted_commands():
# Should extract from the first matching quoted pattern
msg = "Try pip install foo and "pip install bar""
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 4.92μs -> 3.48μs (41.5% faster)

def test_pip_install_with_no_space_after_install():
# Should not match if no space after 'install'
msg = "Try pip installfoo"
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 5.76μs -> 2.81μs (105% faster)

3. Large Scale Test Cases

def test_large_number_of_packages_in_quoted_command():
# Should handle large number of packages in a quoted command
pkgs = [f"pkg{i}" for i in range(100)]
msg = f"Try running pip install {' '.join(pkgs)}"
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 31.6μs -> 30.4μs (3.88% faster)

def test_large_number_of_packages_with_flags_and_duplicates():
# Should skip flags and remove duplicates in large list
pkgs = [f"pkg{i}" for i in range(50)] * 2 # duplicates
flags = ["--upgrade", "-q", "--no-cache-dir"]
# Interleave flags randomly
args = []
for i, pkg in enumerate(pkgs):
args.append(pkg)
if i % 10 == 0:
args.append(random.choice(flags))
msg = f"Try running pip install {' '.join(args)}"
# Only unique pkgs, in order of first appearance
expected = []
seen = set()
for arg in args:
if not arg.startswith("-") and arg not in seen:
expected.append(arg)
seen.add(arg)
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 27.0μs -> 25.3μs (6.74% faster)

def test_large_unquoted_command_only_first_package():
# Should only extract the first package from a large unquoted command
pkgs = [f"pkg{i}" for i in range(100)]
msg = f"Try pip install {' '.join(pkgs)}"
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 11.7μs -> 8.21μs (42.8% faster)

def test_large_message_with_many_irrelevant_lines():
# Should still extract the correct package from a noisy message
pkgs = [f"pkg{i}" for i in range(10)]
noise = "\n".join(
f"This is a random line {i} with some text."
for i in range(200)
)
msg = f"{noise}\nTry running pip install {' '.join(pkgs)}\n{noise}"
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 10.1μs -> 8.73μs (15.2% faster)

def test_large_message_with_multiple_pip_install_commands():
# Should extract from the first matching quoted pattern in a large message
pkgs1 = [f"pkgA{i}" for i in range(10)]
pkgs2 = [f"pkgB{i}" for i in range(10)]
msg = (
f"First: pip install {' '.join(pkgs1)}\n"
f"Second: 'pip install {' '.join(pkgs2)}'"
)
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 7.54μs -> 6.04μs (24.7% faster)

def test_large_package_names():
# Should handle very long package names
long_pkg = "pkg_" + "".join(random.choices(string.ascii_letters + string.digits, k=200))
msg = f"Try running pip install {long_pkg}"
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 5.24μs -> 3.66μs (43.3% faster)

def test_large_number_of_flags_and_packages():
# Should skip all flags and only extract packages
pkgs = [f"pkg{i}" for i in range(50)]
flags = ["--flagA", "--flagB", "-q"]
args = []
for i in range(50):
args.append(random.choice(flags))
args.append(pkgs[i])
msg = f"Try running pip install {' '.join(args)}"
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 25.3μs -> 23.9μs (5.90% faster)

def test_large_number_of_packages_with_extras():
# Should extract all packages with extras
pkgs = [f"pkg{i}[extra1,extra2]" for i in range(50)]
msg = f"Try running pip install {' '.join(pkgs)}"
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 17.9μs -> 16.9μs (5.92% faster)

codeflash_output is used to check that the output of the original code is the same as that of the optimized code.

#------------------------------------------------
from future import annotations

import re

imports

import pytest # used for our unit tests
from marimo._runtime.packages.import_error_extractors import
extract_packages_from_pip_install_suggestion

unit tests

----------- BASIC TEST CASES ------------

def test_basic_backtick_command_single_package():
# Single package in backtick command
msg = "Try running pip install requests to install the missing package."
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 4.80μs -> 3.48μs (38.0% faster)

def test_basic_double_quote_command_multiple_packages():
# Multiple packages in double-quoted command
msg = 'You can fix this by running "pip install numpy pandas scipy"'
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 6.48μs -> 4.45μs (45.5% faster)

def test_basic_single_quote_command_with_flags():
# Command with flags, ensure flags are ignored
msg = "Please run 'pip install --upgrade pip setuptools wheel' to update."
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 7.45μs -> 5.02μs (48.4% faster)

def test_basic_individual_quoted_package():
# pip install with quoted individual package
msg = 'Try pip install "matplotlib"'
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 5.48μs -> 2.65μs (106% faster)

def test_basic_unquoted_package():
# pip install with unquoted package
msg = "Module not found. Please run: pip install flask"
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 7.30μs -> 4.12μs (77.0% faster)

def test_basic_unquoted_package_with_extras():
# pip install with extras
msg = "Try pip install requests[security,socks]"
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 7.06μs -> 3.83μs (84.2% faster)

def test_basic_case_insensitivity():
# pip install in different case
msg = "Try running PIP INSTALL Pillow"
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 5.13μs -> 3.74μs (37.2% faster)

----------- EDGE TEST CASES ------------

def test_edge_no_pip_install_present():
# No pip install command in message
msg = "No suggestion here."
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 4.87μs -> 1.80μs (170% faster)

def test_edge_pip_install_but_no_package():
# pip install but no package specified
msg = "Try running pip install"
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 4.84μs -> 1.84μs (162% faster)

def test_edge_command_with_only_flags():
# pip install with only flags, no packages
msg = "Run pip install --upgrade"
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 8.96μs -> 5.87μs (52.6% faster)

def test_edge_duplicate_packages():
# Duplicate package names should only be returned once
msg = 'Try "pip install pandas pandas numpy pandas"'
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 6.89μs -> 4.96μs (38.9% faster)

def test_edge_package_with_hyphen_and_dot():
# Package names with hyphens and dots
msg = 'Try running "pip install my-package another.pkg"'
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 6.08μs -> 4.21μs (44.5% faster)

def test_edge_package_with_extras_and_version():
# Package with extras and version specifier
msg = 'Try running pip install "foo[extra1,extra2]==1.2.3"'
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 5.38μs -> 3.76μs (43.0% faster)

def test_edge_command_with_mixed_quotes():
# Command with mixed quotes (should not match)
msg = "Try running 'pip install "foo"'"
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 6.76μs -> 4.25μs (59.2% faster)

def test_edge_multiple_pip_install_commands():
# Multiple pip install commands, should only extract from the first match
msg = (
"First, run pip install alpha beta. Then, run pip install gamma."
)
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 5.50μs -> 4.08μs (34.9% faster)

def test_edge_pip_install_in_middle_of_text():
# pip install appears mid-sentence
msg = (
"If you get errors, pip install seaborn should help."
)
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 7.29μs -> 4.05μs (80.2% faster)

def test_edge_pip_install_with_trailing_punctuation():
# pip install followed by punctuation
msg = "Missing? Try pip install pytest!"
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 6.67μs -> 3.58μs (86.3% faster)

def test_edge_pip_install_with_quoted_flagged_package():
# pip install with quoted flag and package
msg = 'Try pip install "--upgrade" "pytest"'
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 5.47μs -> 2.68μs (104% faster)

def test_edge_pip_install_with_non_ascii_package():
# Non-ASCII package name (should match valid ASCII subset)
msg = "Try pip install café"
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 6.58μs -> 3.40μs (93.4% faster)

def test_edge_pip_install_with_tabs_and_newlines():
# pip install with tabs and newlines
msg = "Please run pip install\tfoo\nbar"
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 5.61μs -> 4.20μs (33.4% faster)

def test_edge_pip_install_with_leading_and_trailing_spaces():
# pip install with extra spaces
msg = "Try running pip install foo bar "
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 5.43μs -> 3.89μs (39.7% faster)

def test_edge_pip_install_with_colon():
# pip install after a colon
msg = "To install: pip install pytest"
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 7.10μs -> 3.81μs (86.3% faster)

def test_edge_pip_install_with_comment_like_text():
# pip install inside a comment
msg = "# pip install requests"
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 6.58μs -> 3.42μs (92.5% faster)

def test_edge_pip_install_with_interpolated_variable():
# pip install with variable (should extract as is)
msg = "Try pip install ${PACKAGE}"
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 5.06μs -> 3.62μs (39.9% faster)

def test_edge_pip_install_with_multiple_spaces_and_flags():
# pip install with multiple spaces and flags
msg = "Try 'pip install --no-cache-dir torch torchvision'"
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 7.22μs -> 4.71μs (53.2% faster)

def test_edge_pip_install_with_brackets_in_package():
# pip install with brackets in package name (extras)
msg = "Try pip install pandas[excel]"
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 7.12μs -> 3.93μs (81.3% faster)

def test_edge_pip_install_with_dash_and_underscore():
# pip install with dash and underscore in package name
msg = "Try pip install my_pkg-name"
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 6.69μs -> 3.33μs (101% faster)

def test_edge_pip_install_with_dot_in_package():
# pip install with dot in package name
msg = "Try pip install foo.bar"
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 6.38μs -> 3.31μs (92.5% faster)

----------- LARGE SCALE TEST CASES ------------

def test_large_scale_many_packages_in_backtick():
# Large number of packages in backtick command
pkgs = [f"pkg{i}" for i in range(100)]
msg = f"Try pip install {' '.join(pkgs)}"
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 31.3μs -> 30.1μs (3.93% faster)

def test_large_scale_many_packages_with_flags_and_duplicates():
# Large number of packages, with flags and duplicates
pkgs = [f"pkg{i}" for i in range(50)]
msg = f"Try 'pip install --no-cache-dir {' '.join(pkgs)} {' '.join(pkgs)} --upgrade'"
# Should deduplicate and skip flags
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 27.9μs -> 25.0μs (11.3% faster)

def test_large_scale_long_message_with_one_pip_install():
# Very long message, only one pip install command
pkgs = [f"lib{i}" for i in range(30)]
filler = "blah " * 200
msg = f"{filler}Please run pip install {' '.join(pkgs)} to continue. {filler}"
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 12.7μs -> 10.9μs (16.5% faster)

def test_large_scale_multiple_pip_installs_only_first_used():
# Multiple pip install commands, only first should be extracted
pkgs1 = [f"a{i}" for i in range(10)]
pkgs2 = [f"b{i}" for i in range(10)]
msg = (
f"First: 'pip install {' '.join(pkgs1)}'. "
f"Second: 'pip install {' '.join(pkgs2)}'."
)
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 8.86μs -> 6.36μs (39.4% faster)

def test_large_scale_unquoted_pip_install():
# Large scale unquoted pip install
msg = "pip install reallybigpackage123"
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 7.03μs -> 3.84μs (83.1% faster)

def test_large_scale_individual_quoted_package():
# Large scale quoted package
msg = 'pip install "superhugepackage"'
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 5.27μs -> 2.52μs (109% faster)

def test_large_scale_package_with_long_extras():
# Package with very long extras list
extras = ",".join(f"extra{i}" for i in range(50))
msg = f"Try pip install foo[{extras}]"
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 12.7μs -> 9.55μs (33.4% faster)

def test_large_scale_message_with_no_pip_install():
# Very long message with no pip install
msg = "lorem ipsum " * 500
codeflash_output = extract_packages_from_pip_install_suggestion(msg) # 79.7μs -> 77.2μs (3.28% faster)

codeflash_output is used to check that the output of the original code is the same as that of the optimized code.

#------------------------------------------------
from marimo._runtime.packages.import_error_extractors import extract_packages_from_pip_install_suggestion

def test_extract_packages_from_pip_install_suggestion():
extract_packages_from_pip_install_suggestion('')

🔎 Concolic Coverage Tests and Runtime
Test File::Test Function Original ⏱️ Optimized ⏱️ Speedup
codeflash_concolic_bps3n5s8/tmpnhys_n75/test_concolic_coverage.py::test_extract_packages_from_pip_install_suggestion 4.64μs 1.28μs 264%✅

To edit these changes git checkout codeflash/optimize-extract_packages_from_pip_install_suggestion-mhv452rr and push.

Codeflash Static Badge

The optimization achieves a **35% speedup** by **precompiling all regular expressions** at module load time instead of compiling them on every function call.

**Key changes:**
- **Precompiled regex patterns**: The three `quoted_patterns`, `individual_quoted_pattern`, and `unquoted_pattern` are now compiled once as module-level constants (`_quoted_patterns`, `_individual_quoted_pattern`, `_unquoted_pattern`) with `re.IGNORECASE` flags baked in.
- **Direct pattern.search() calls**: Instead of `re.search(pattern, message, re.IGNORECASE)`, the code now calls `pattern.search(message)` on precompiled pattern objects.

**Why this is faster:**
In Python, `re.search()` with a string pattern must compile the regex every time it's called. The line profiler shows the original code spent significant time in regex compilation (25.6% + 6.2% + 16.3% = 48.1% of total time on the three `re.search()` calls). Precompiled patterns eliminate this overhead entirely, as regex compilation happens only once at import time.

**Performance impact:**
The optimization is most effective for:
- **Frequent calls**: Test cases show 30-170% speedups, with the biggest gains when patterns don't match (like `test_no_pip_install_present` at 168% faster)
- **Complex patterns**: The quoted patterns with multiple alternatives benefit most from precompilation
- **Large-scale scenarios**: Even with 100+ packages, the optimization maintains 3-11% improvements

The optimization preserves all functionality while providing consistent performance gains across all test scenarios, making it particularly valuable if this function is called frequently during import error handling.
@codeflash-ai codeflash-ai bot requested a review from mashraf-222 November 11, 2025 21:58
@codeflash-ai codeflash-ai bot added ⚡️ codeflash Optimization PR opened by Codeflash AI 🎯 Quality: High Optimization Quality according to Codeflash labels Nov 11, 2025
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⚡️ codeflash Optimization PR opened by Codeflash AI 🎯 Quality: High Optimization Quality according to Codeflash

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