I don't run backtest very often. I notice that my backtesting is very slow and stays at the very beginning. This is not the case in the past. Does anyone else have the same issue?
I've noticed that backtests running times are totally consistent - but in order to diagnose your problem I need more information.
Ideally your entire backtest. But if you don't want to share all that your pipeline(s) would be be a good place to start, then your trade/rebalance function.
@Shuang Liang Sorry to hear you are experiencing slow down issues. There aren't any system wide problems that we know of which would cause a slow down. Is this for all your backtests or just a specific one? You can submit a help request if it's just one (click on the 'Contact Support' link at the bottom of the page. Attach your algo by checking the box labeled 'I need help with a specific algorithm, backtest, live algorithm, or notebook.') We could work with you to resolve the issue that way.
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The material on this website is provided for informational purposes only and does not constitute an offer to sell, a solicitation to buy, or a recommendation or endorsement for any security or strategy, nor does it constitute an offer to provide investment advisory services by Quantopian.
In addition, the material offers no opinion with respect to the suitability of any security or specific investment. No information contained herein should be regarded as a suggestion to engage in or refrain from any investment-related course of action as none of Quantopian nor any of its affiliates is undertaking to provide investment advice, act as an adviser to any plan or entity subject to the Employee Retirement Income Security Act of 1974, as amended, individual retirement account or individual retirement annuity, or give advice in a fiduciary capacity with respect to the materials presented herein. If you are an individual retirement or other investor, contact your financial advisor or other fiduciary unrelated to Quantopian about whether any given investment idea, strategy, product or service described herein may be appropriate for your circumstances. All investments involve risk, including loss of principal. Quantopian makes no guarantees as to the accuracy or completeness of the views expressed in the website. The views are subject to change, and may have become unreliable for various reasons, including changes in market conditions or economic circumstances.