chore(internal): remove time functions from compat module

[vitor-de-araujo]

This PR removes 4 time-related functions from ddtrace.internal.compat that existed for compatibility with Python < 3.7, and replaces all uses with the corresponding functions from the builtin time module: time_ns, monotonic, monotonic_ns, process_time_ns.

The original motivation for this was noticing that the fallback code for time_ns had the wrong multiplier [edit: it's not actually wrong, just written in a weird way], and then checking that we don't really need these functions anymore, as we only support Python >= 3.7.

Checklist

• [x] PR author has checked that all the criteria below are met
• The PR description includes an overview of the change
• The PR description articulates the motivation for the change
• The change includes tests OR the PR description describes a testing strategy
• The PR description notes risks associated with the change, if any
• Newly-added code is easy to change
• The change follows the library release note guidelines
• The change includes or references documentation updates if necessary
• Backport labels are set (if applicable)

Reviewer Checklist

• [x] Reviewer has checked that all the criteria below are met
• Title is accurate
• All changes are related to the pull request's stated goal
• Avoids breaking API changes
• Testing strategy adequately addresses listed risks
• Newly-added code is easy to change
• Release note makes sense to a user of the library
• If necessary, author has acknowledged and discussed the performance implications of this PR as reported in the benchmarks PR comment
• Backport labels are set in a manner that is consistent with the release branch maintenance policy

[github-actions[bot]]

CODEOWNERS have been resolved as:

benchmarks/rate_limiter/scenario.py                                     @DataDog/apm-core-python
ddtrace/_trace/span.py                                                  @DataDog/apm-sdk-api-python
ddtrace/contrib/internal/botocore/services/kinesis.py                   @DataDog/apm-core-python @DataDog/apm-idm-python
ddtrace/contrib/internal/kafka/patch.py                                 @DataDog/apm-core-python @DataDog/apm-idm-python
ddtrace/debugging/_debugger.py                                          @DataDog/debugger-python
ddtrace/internal/compat.py                                              @DataDog/python-guild @DataDog/apm-core-python
ddtrace/internal/opentelemetry/span.py                                  @DataDog/apm-sdk-api-python
ddtrace/internal/rate_limiter.py                                        @DataDog/apm-core-python
ddtrace/internal/utils/time.py                                          @DataDog/apm-core-python
ddtrace/profiling/collector/_lock.py                                    @DataDog/profiling-python
ddtrace/profiling/collector/memalloc.py                                 @DataDog/profiling-python
ddtrace/profiling/collector/stack.pyx                                   @DataDog/profiling-python
ddtrace/profiling/scheduler.py                                          @DataDog/profiling-python
tests/debugging/mocking.py                                              @DataDog/debugger-python
tests/integration/test_sampling.py                                      @DataDog/apm-core-python
tests/profiling/exporter/test_http.py                                   @DataDog/profiling-python
tests/profiling/test_accuracy.py                                        @DataDog/profiling-python
tests/profiling/test_scheduler.py                                       @DataDog/profiling-python
tests/submod/stuff.py                                                   @DataDog/apm-core-python
tests/tracer/test_rate_limiter.py                                       @DataDog/apm-sdk-api-python

[datadog-dd-trace-py-rkomorn[bot]]

Datadog Report

Branch report: vitor-de-araujo/remove-compat-time-ns Commit report: 4c5eb19 Test service: dd-trace-py

:white_check_mark: 0 Failed, 1286 Passed, 0 Skipped, 31m 40.61s Total duration (6m 40.36s time saved)

[pr-commenter[bot]]

Benchmarks

Benchmark execution time: 2024-10-15 10:03:54

Comparing candidate commit 4c5eb19c51fccee93876a8d19b552b08def18755 in PR branch vitor-de-araujo/remove-compat-time-ns with baseline commit 6505d83260f8aaae96d19dbfec7e0fb35ca13b49 in branch main.

Found 0 performance improvements and 0 performance regressions! Performance is the same for 371 metrics, 53 unstable metrics.