⚡️ Speed up method bittrade.parse_cancel_orders by 29%

[codeflash-ai]

📄 29% (0.29x) speedup for bittrade.parse_cancel_orders in python/ccxt/async_support/bittrade.py

⏱️ Runtime : 108 milliseconds → 84.0 milliseconds (best of 44 runs)

📝 Explanation and details

The optimized code achieves a 28% speedup through several key optimizations targeting the most expensive operations in the line profiler:

1. Optimized safe_string method (31.8% reduction in time per hit)

• Replaced the complex Exchange.key_exists() logic with direct dict.get() and explicit None/empty checks
• Eliminated expensive exception handling and repeated dictionary lookups
• This is critical since safe_string is called 154,020 times and was consuming 195ms in the original code

2. Streamlined safe_string_2 method

• Inlined the safe_either logic to avoid an extra function call
• Reduced time per hit from 5989ns to 3445ns for the first lookup
• Important since this method is called frequently (9,927 times) in hot paths

3. List comprehension optimization in parse_cancel_orders

• Replaced explicit loops with list comprehensions for building result arrays
• Eliminates repeated append() calls and range iteration overhead
• Particularly effective for large-scale test cases with 500+ orders, showing ~29% improvement

4. Method reference caching in safe_order

• Stored frequently accessed methods (self.safe_string, self.safe_value, etc.) as local variables
• Reduces attribute lookup overhead in the method that processes 6,653 orders
• Each cached reference saves repeated self. attribute resolution

5. Variable name conflict resolution

• Changed datetime variable to datetime_val to avoid shadowing the imported datetime module
• Prevents potential performance issues from name resolution conflicts

The optimizations are most effective for large-scale workloads (500+ orders) where the cumulative effect of reduced per-operation overhead becomes significant. The test results show consistent 25-30% improvements for bulk operations while maintaining smaller but measurable gains (9-15%) for individual order processing. All functionality and return values remain identical - only the internal implementation efficiency has been improved.

✅ Correctness verification report:

Test	Status
⚙️ Existing Unit Tests	🔘 None Found
🌀 Generated Regression Tests	✅ 141 Passed
⏪ Replay Tests	🔘 None Found
🔎 Concolic Coverage Tests	🔘 None Found
📊 Tests Coverage	100.0%

🌀 Generated Regression Tests and Runtime

import pytest
from ccxt.async_support.bittrade import bittrade

# ------------------- UNIT TESTS -------------------

@pytest.fixture
def parser():
    return bittrade()

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

def test_successes_as_comma_string(parser):
    # Typical case: successes as comma-separated string, no errors
    orders = {
        "successes": "123,456,789"
    }
    codeflash_output = parser.parse_cancel_orders(orders); result = codeflash_output # 81.9μs -> 72.0μs (13.8% faster)
    # info field should match id
    for r in result:
        pass

def test_success_list(parser):
    # Typical case: 'success' as list, no errors
    orders = {
        "success": ["abc", "def"]
    }
    codeflash_output = parser.parse_cancel_orders(orders); result = codeflash_output # 64.4μs -> 57.8μs (11.5% faster)

def test_failed_orders(parser):
    # Typical case: failed orders only
    orders = {
        "failed": [
            {
                "err-msg": "Incorrect order state",
                "order-state": 7,
                "order-id": "fail1",
                "err-code": "order-orderstate-error",
                "client-order-id": "clientA"
            },
            {
                "err-msg": "Order not found",
                "order-state": 9,
                "order-id": "fail2",
                "err-code": "order-notfound-error",
                "client-order-id": "clientB"
            }
        ]
    }
    codeflash_output = parser.parse_cancel_orders(orders); result = codeflash_output # 66.4μs -> 59.2μs (12.2% faster)
    for r in result:
        pass

def test_errors_key(parser):
    # Typical case: errors key with order_id and err_code
    orders = {
        "errors": [
            {
                "order_id": "fail3",
                "err_code": 1061,
                "err_msg": "This order doesnt exist."
            }
        ]
    }
    codeflash_output = parser.parse_cancel_orders(orders); result = codeflash_output # 45.2μs -> 41.2μs (9.81% faster)
    r = result[0]

def test_mixed_success_and_failed(parser):
    # Both successes and failed in one payload
    orders = {
        "success": ["1", "2"],
        "failed": [
            {
                "order-id": "failA",
                "client-order-id": "clientX"
            }
        ]
    }
    codeflash_output = parser.parse_cancel_orders(orders); result = codeflash_output # 84.0μs -> 74.1μs (13.4% faster)
    canceled = [r for r in result if r['status'] == 'canceled']
    failed = [r for r in result if r['status'] == 'failed']

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

def test_empty_orders(parser):
    # Empty input dict
    orders = {}
    codeflash_output = parser.parse_cancel_orders(orders); result = codeflash_output # 6.11μs -> 6.16μs (0.699% slower)

def test_successes_empty_string(parser):
    # successes is an empty string
    orders = {
        "successes": ""
    }
    codeflash_output = parser.parse_cancel_orders(orders); result = codeflash_output # 5.42μs -> 6.28μs (13.7% slower)

def test_success_key_empty_list(parser):
    # success is an empty list
    orders = {
        "success": []
    }
    codeflash_output = parser.parse_cancel_orders(orders); result = codeflash_output # 6.45μs -> 6.52μs (1.12% slower)

def test_failed_empty_list(parser):
    # failed is an empty list
    orders = {
        "failed": []
    }
    codeflash_output = parser.parse_cancel_orders(orders); result = codeflash_output # 6.47μs -> 6.51μs (0.584% slower)

def test_errors_empty_list(parser):
    # errors is an empty list
    orders = {
        "errors": []
    }
    codeflash_output = parser.parse_cancel_orders(orders); result = codeflash_output # 6.40μs -> 6.49μs (1.43% slower)

def test_failed_missing_order_id(parser):
    # failed entry missing order-id and order_id
    orders = {
        "failed": [
            {
                "err-msg": "No ID",
                "client-order-id": "clientZ"
            }
        ]
    }
    codeflash_output = parser.parse_cancel_orders(orders); result = codeflash_output # 46.6μs -> 42.6μs (9.34% faster)
    r = result[0]

def test_failed_missing_client_order_id(parser):
    # failed entry missing client-order-id
    orders = {
        "failed": [
            {
                "order-id": "failX"
            }
        ]
    }
    codeflash_output = parser.parse_cancel_orders(orders); result = codeflash_output # 45.7μs -> 41.9μs (9.04% faster)
    r = result[0]

def test_success_and_errors(parser):
    # successes as string, errors as list
    orders = {
        "successes": "100,200",
        "errors": [
            {
                "order_id": "failY",
                "err_code": 999
            }
        ]
    }
    codeflash_output = parser.parse_cancel_orders(orders); result = codeflash_output # 84.7μs -> 73.3μs (15.6% faster)
    canceled = [r for r in result if r['status'] == 'canceled']
    failed = [r for r in result if r['status'] == 'failed']

def test_failed_order_id_vs_order_id(parser):
    # failed entry with both order-id and order_id, should prefer order-id
    orders = {
        "failed": [
            {
                "order-id": "failA",
                "order_id": "failB",
                "client-order-id": "clientQ"
            }
        ]
    }
    codeflash_output = parser.parse_cancel_orders(orders); result = codeflash_output # 45.7μs -> 40.9μs (11.7% faster)
    r = result[0]

def test_failed_entry_not_dict(parser):
    # failed entry is not a dict (should not crash, but info is just the value)
    orders = {
        "failed": ["failC"]
    }
    codeflash_output = parser.parse_cancel_orders(orders); result = codeflash_output # 45.8μs -> 41.0μs (11.6% faster)
    r = result[0]

def test_success_entry_not_string(parser):
    # success entry is not a string (should be returned as is)
    orders = {
        "success": [123, None]
    }
    codeflash_output = parser.parse_cancel_orders(orders); result = codeflash_output # 64.7μs -> 57.7μs (12.2% faster)

def test_failed_entry_with_extra_fields(parser):
    # failed entry with extra irrelevant fields
    orders = {
        "failed": [
            {
                "order-id": "failD",
                "client-order-id": "clientW",
                "extra": "something",
                "another": 42
            }
        ]
    }
    codeflash_output = parser.parse_cancel_orders(orders); result = codeflash_output # 45.1μs -> 41.7μs (8.08% faster)
    r = result[0]

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

def test_many_successes(parser):
    # Large number of successes, no failures
    n = 500
    orders = {
        "successes": ",".join(str(i) for i in range(n))
    }
    codeflash_output = parser.parse_cancel_orders(orders); result = codeflash_output # 7.87ms -> 6.07ms (29.6% faster)
    for i, r in enumerate(result):
        pass

def test_many_failed(parser):
    # Large number of failed orders
    n = 500
    orders = {
        "failed": [
            {
                "order-id": f"fail{i}",
                "client-order-id": f"client{i}"
            } for i in range(n)
        ]
    }
    codeflash_output = parser.parse_cancel_orders(orders); result = codeflash_output # 8.25ms -> 6.38ms (29.3% faster)
    for i, r in enumerate(result):
        pass

def test_many_success_and_failed(parser):
    # Many successes and failed mixed
    n = 250
    orders = {
        "success": [str(i) for i in range(n)],
        "failed": [
            {
                "order-id": f"fail{i}",
                "client-order-id": f"client{i}"
            } for i in range(n)
        ]
    }
    codeflash_output = parser.parse_cancel_orders(orders); result = codeflash_output # 8.03ms -> 6.27ms (28.0% faster)
    canceled = [r for r in result if r['status'] == 'canceled']
    failed = [r for r in result if r['status'] == 'failed']
    # Spot check a few
    for i in [0, n//2, n-1]:
        pass

def test_large_payload_with_empty_fields(parser):
    # Large payload, but all lists are empty
    orders = {
        "success": [],
        "failed": [],
        "errors": []
    }
    codeflash_output = parser.parse_cancel_orders(orders); result = codeflash_output # 6.33μs -> 6.79μs (6.84% slower)

def test_large_payload_with_mixed_empty_and_nonempty(parser):
    # Large payload with some empty and some filled fields
    n = 100
    orders = {
        "success": [str(i) for i in range(n)],
        "failed": [],
        "errors": []
    }
    codeflash_output = parser.parse_cancel_orders(orders); result = codeflash_output # 1.58ms -> 1.24ms (27.3% faster)
    for i, r in enumerate(result):
        pass
# codeflash_output is used to check that the output of the original code is the same as that of the optimized code.

import pytest
from ccxt.async_support.bittrade import bittrade


# Test suite
@pytest.fixture
def parser():
    return bittrade()

# 1. Basic Test Cases

def test_successes_as_string(parser):
    # Typical API response with 'successes' as comma-separated string
    orders = {
        "successes": "1258075374411399168,1258075393254871040"
    }
    codeflash_output = parser.parse_cancel_orders(orders); result = codeflash_output # 63.8μs -> 56.9μs (12.1% faster)

def test_success_as_list(parser):
    # Typical API response with 'success' as a list
    orders = {
        "success": ["5983466", "5983467"]
    }
    codeflash_output = parser.parse_cancel_orders(orders); result = codeflash_output # 63.7μs -> 57.4μs (11.0% faster)
    for r in result:
        pass

def test_failed_as_list(parser):
    # Typical API response with 'failed' as a list
    orders = {
        "failed": [
            {
                "err-msg": "Incorrect order state",
                "order-state": 7,
                "order-id": "12345",
                "err-code": "order-orderstate-error",
                "client-order-id": "first"
            },
            {
                "err-msg": "Another error",
                "order-state": 8,
                "order-id": "67890",
                "err-code": "order-other-error",
                "client-order-id": "second"
            }
        ]
    }
    codeflash_output = parser.parse_cancel_orders(orders); result = codeflash_output # 66.2μs -> 59.9μs (10.6% faster)

def test_errors_as_list(parser):
    # Typical API response with 'errors' as a list
    orders = {
        "errors": [
            {
                "order_id": "769206471845261312",
                "err_code": 1061,
                "err_msg": "This order doesnt exist."
            }
        ]
    }
    codeflash_output = parser.parse_cancel_orders(orders); result = codeflash_output # 45.6μs -> 41.8μs (9.21% faster)

def test_success_and_failed(parser):
    # Both success and failed present
    orders = {
        "success": ["111", "222"],
        "failed": [
            {"order-id": "333", "client-order-id": "cid333"},
            {"order-id": "444", "client-order-id": "cid444"}
        ]
    }
    codeflash_output = parser.parse_cancel_orders(orders); result = codeflash_output # 100μs -> 87.2μs (15.5% faster)

# 2. Edge Test Cases

def test_empty_successes_string(parser):
    # 'successes' is an empty string
    orders = {"successes": ""}
    codeflash_output = parser.parse_cancel_orders(orders); result = codeflash_output # 5.62μs -> 6.22μs (9.69% slower)

def test_empty_success_list(parser):
    # 'success' is an empty list
    orders = {"success": []}
    codeflash_output = parser.parse_cancel_orders(orders); result = codeflash_output # 6.53μs -> 6.49μs (0.631% faster)

def test_empty_failed_list(parser):
    # 'failed' is an empty list
    orders = {"failed": []}
    codeflash_output = parser.parse_cancel_orders(orders); result = codeflash_output # 6.30μs -> 6.50μs (3.11% slower)

def test_empty_errors_list(parser):
    # 'errors' is an empty list
    orders = {"errors": []}
    codeflash_output = parser.parse_cancel_orders(orders); result = codeflash_output # 6.24μs -> 6.46μs (3.39% slower)

def test_missing_all_keys(parser):
    # No relevant keys present
    orders = {"other": "value"}
    codeflash_output = parser.parse_cancel_orders(orders); result = codeflash_output # 6.08μs -> 6.13μs (0.751% slower)

def test_failed_with_missing_order_id(parser):
    # 'failed' entry missing 'order-id' and 'order_id'
    orders = {
        "failed": [
            {"err-msg": "Error", "client-order-id": "cid"}
        ]
    }
    codeflash_output = parser.parse_cancel_orders(orders); result = codeflash_output # 46.9μs -> 42.6μs (10.0% faster)

def test_failed_with_empty_order_id(parser):
    # 'failed' entry with empty 'order-id'
    orders = {
        "failed": [
            {"order-id": "", "client-order-id": "cid"}
        ]
    }
    codeflash_output = parser.parse_cancel_orders(orders); result = codeflash_output # 46.2μs -> 42.3μs (9.34% faster)

def test_failed_with_missing_client_order_id(parser):
    # 'failed' entry missing 'client-order-id'
    orders = {
        "failed": [
            {"order-id": "12345"}
        ]
    }
    codeflash_output = parser.parse_cancel_orders(orders); result = codeflash_output # 45.9μs -> 41.9μs (9.57% faster)

def test_success_and_errors(parser):
    # 'success' and 'errors' present
    orders = {
        "success": ["555"],
        "errors": [
            {"order_id": "666", "err_code": 1, "err_msg": "fail"}
        ]
    }
    codeflash_output = parser.parse_cancel_orders(orders); result = codeflash_output # 66.5μs -> 60.0μs (10.7% faster)

def test_successes_and_failed_and_errors(parser):
    # All three keys present, 'failed' and 'errors' should be merged
    orders = {
        "successes": "777,888",
        "failed": [
            {"order-id": "999", "client-order-id": "cid999"}
        ],
        "errors": [
            {"order_id": "1010", "err_code": 2, "err_msg": "fail2"}
        ]
    }
    # 'failed' and 'errors' both present, but only one is used (safe_list_2 uses first non-empty)
    codeflash_output = parser.parse_cancel_orders(orders); result = codeflash_output # 83.2μs -> 72.8μs (14.3% faster)

def test_successes_and_failed_and_empty_errors(parser):
    # 'errors' present but empty, should fallback to 'failed'
    orders = {
        "successes": "777",
        "failed": [
            {"order-id": "999", "client-order-id": "cid999"}
        ],
        "errors": []
    }
    codeflash_output = parser.parse_cancel_orders(orders); result = codeflash_output # 43.1μs -> 39.9μs (7.88% faster)

def test_successes_and_empty_failed_and_errors(parser):
    # 'failed' empty, 'errors' present and non-empty
    orders = {
        "successes": "777",
        "failed": [],
        "errors": [
            {"order_id": "1010", "err_code": 2, "err_msg": "fail2"}
        ]
    }
    codeflash_output = parser.parse_cancel_orders(orders); result = codeflash_output # 66.0μs -> 58.5μs (12.7% faster)

def test_successes_with_spaces(parser):
    # 'successes' string with spaces
    orders = {
        "successes": "  777 , 888 "
    }
    codeflash_output = parser.parse_cancel_orders(orders); result = codeflash_output # 63.9μs -> 57.1μs (11.9% faster)

def test_successes_with_one_empty(parser):
    # 'successes' string with empty after comma
    orders = {
        "successes": "777,"
    }
    codeflash_output = parser.parse_cancel_orders(orders); result = codeflash_output # 63.2μs -> 57.7μs (9.63% faster)

def test_success_and_failed_with_mixed_ids(parser):
    # 'success' and 'failed' with some ids as None or empty
    orders = {
        "success": ["", None, "abc"],
        "failed": [
            {"order-id": None, "client-order-id": "cid1"},
            {"order-id": "", "client-order-id": "cid2"},
            {"order-id": "def", "client-order-id": None}
        ]
    }
    codeflash_output = parser.parse_cancel_orders(orders); result = codeflash_output # 134μs -> 113μs (18.7% faster)

# 3. Large Scale Test Cases

def test_large_successes(parser):
    # Large number of successes
    ids = [str(i) for i in range(1000)]
    orders = {
        "success": ids
    }
    codeflash_output = parser.parse_cancel_orders(orders); result = codeflash_output # 15.7ms -> 12.1ms (29.1% faster)
    for i in range(1000):
        pass

def test_large_failed(parser):
    # Large number of failed
    failed = [{"order-id": str(i), "client-order-id": f"cid{i}"} for i in range(1000)]
    orders = {
        "failed": failed
    }
    codeflash_output = parser.parse_cancel_orders(orders); result = codeflash_output # 16.5ms -> 12.8ms (28.8% faster)
    for i in range(1000):
        pass

def test_large_successes_and_failed(parser):
    # Large number of both successes and failed
    success_ids = [str(i) for i in range(500)]
    failed = [{"order-id": str(i+500), "client-order-id": f"cid{i+500}"} for i in range(500)]
    orders = {
        "success": success_ids,
        "failed": failed
    }
    codeflash_output = parser.parse_cancel_orders(orders); result = codeflash_output # 16.1ms -> 12.5ms (28.6% faster)
    for i in range(500):
        pass
    for i in range(500, 1000):
        pass

def test_large_successes_string(parser):
    # Large number of successes as comma-separated string
    ids = [str(i) for i in range(1000)]
    orders = {
        "successes": ",".join(ids)
    }
    codeflash_output = parser.parse_cancel_orders(orders); result = codeflash_output # 15.8ms -> 12.2ms (29.2% faster)
    for i in range(1000):
        pass

def test_large_errors(parser):
    # Large number of errors
    errors = [{"order_id": str(i), "err_code": i, "err_msg": "fail"} for i in range(1000)]
    orders = {
        "errors": errors
    }
    codeflash_output = parser.parse_cancel_orders(orders); result = codeflash_output # 16.7ms -> 12.8ms (31.0% faster)
    for i in range(1000):
        pass
# codeflash_output is used to check that the output of the original code is the same as that of the optimized code.

To edit these changes git checkout codeflash/optimize-bittrade.parse_cancel_orders-mhyie0hq and push.