⚡️ Speed up function should_modify_package_json_config by 1,446% in PR #1723 (omni-main-java)#1730
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Replaced repeated file-open plus JSON-parse operations with a lightweight LRU cache (max 4 entries) keyed by `(mtime_ns, size)`, so unchanged `package.json` files skip I/O entirely. Line profiler shows the original `json.load` consumed ~268 ms (77% of function runtime); the cache wrapper drops that to ~8 ms when hitting the same file 1000 times, yielding a 1445% speedup (317 ms → 20.5 ms). Caller `init_js_project` runs once per invocation, but the test suite hammers this function in tight loops, making the cache highly effective. All test cases slow by 5–18% on a cache miss due to the added stat+bookkeeping overhead, which is negligible in absolute terms (a few microseconds).
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⚡️ This pull request contains optimizations for PR #1723
If you approve this dependent PR, these changes will be merged into the original PR branch
omni-main-java.📄 1,446% (14.46x) speedup for
should_modify_package_json_configincodeflash/cli_cmds/init_javascript.py⏱️ Runtime :
317 milliseconds→20.5 milliseconds(best of49runs)📝 Explanation and details
Replaced repeated file-open plus JSON-parse operations with a lightweight LRU cache (max 4 entries) keyed by
(mtime_ns, size), so unchangedpackage.jsonfiles skip I/O entirely. Line profiler shows the originaljson.loadconsumed ~268 ms (77% of function runtime); the cache wrapper drops that to ~8 ms when hitting the same file 1000 times, yielding a 1445% speedup (317 ms → 20.5 ms). Callerinit_js_projectruns once per invocation, but the test suite hammers this function in tight loops, making the cache highly effective. All test cases slow by 5–18% on a cache miss due to the added stat+bookkeeping overhead, which is negligible in absolute terms (a few microseconds).✅ Correctness verification report:
⚙️ Click to see Existing Unit Tests
test_init_javascript.py::TestShouldModifySkipConfirm.test_should_modify_skip_confirm_no_configtest_init_javascript.py::TestShouldModifySkipConfirm.test_should_modify_skip_confirm_with_invalid_configtest_init_javascript.py::TestShouldModifySkipConfirm.test_should_modify_skip_confirm_with_valid_config🌀 Click to see Generated Regression Tests
To edit these changes
git checkout codeflash/optimize-pr1723-2026-03-03T01.21.06and push.