Revert "Make get_signals async. This should speed up create_trade calls by at least 10x. (#223)" (#275)

This reverts commit 6768658300.
See details in #PR266

freqtrade/analyze.py

@@ -144,9 +144,6 @@ def get_signal(pair: str, signal: SignalType) -> bool:
     except ValueError as ex:
         logger.warning('Unable to analyze ticker for pair %s: %s', pair, str(ex))
         return False
-    except Exception:
-        logger.exception('Unexpected error when analyzing ticker for pair %s.', pair)
-        return False
 
     if dataframe.empty:
         return False

freqtrade/exchange/__init__.py

@@ -3,7 +3,6 @@
 import enum
 import logging
 from random import randint
-from threading import RLock
 from typing import List, Dict, Any, Optional
 
 import arrow
@@ -15,7 +14,6 @@ from freqtrade.exchange.bittrex import Bittrex
 from freqtrade.exchange.interface import Exchange
 
 logger = logging.getLogger(__name__)
-lock = RLock()
 
 # Current selected exchange
 _API: Exchange = None
@@ -140,7 +138,7 @@ def get_ticker(pair: str) -> dict:
     return _API.get_ticker(pair)
 
 
-@cached(TTLCache(maxsize=100, ttl=30), lock=lock)
+@cached(TTLCache(maxsize=100, ttl=30))
 def get_ticker_history(pair: str, tick_interval: Optional[int] = 5) -> List[Dict]:
     return _API.get_ticker_history(pair, tick_interval)
 

freqtrade/main.py

@@ -1,12 +1,10 @@
 #!/usr/bin/env python3
-import asyncio
 import copy
 import json
 import logging
 import sys
 import time
 import traceback
-from concurrent.futures import ThreadPoolExecutor
 from datetime import datetime
 from typing import Dict, Optional, List
 
@@ -243,17 +241,8 @@ def create_trade(stake_amount: float) -> bool:
         raise DependencyException('No pair in whitelist')
 
     # Pick pair based on StochRSI buy signals
-    with ThreadPoolExecutor() as pool:
-        awaitable_signals = [
-            asyncio.wrap_future(pool.submit(get_signal, pair, SignalType.BUY))
-            for pair in whitelist
-        ]
-
-    loop = asyncio.get_event_loop()
-    signals = loop.run_until_complete(asyncio.gather(*awaitable_signals))
-
-    for idx, _pair in enumerate(whitelist):
-        if signals[idx]:
+    for _pair in whitelist:
+        if get_signal(_pair, SignalType.BUY):
             pair = _pair
             break
     else: