2024-05-15 15:20:32 -04:00
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---
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2023-12-11 20:30:44 -05:00
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c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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SPDX-License-Identifier: curl
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Long: rate
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Arg: <max request rate>
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Help: Request rate for serial transfers
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Category: connection
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Added: 7.84.0
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Multi: single
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Scope: global
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2024-05-15 15:20:32 -04:00
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See-also:
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- limit-rate
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- retry-delay
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Example:
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- --rate 2/s $URL ...
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- --rate 3/h $URL ...
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- --rate 14/m $URL ...
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2023-12-11 20:30:44 -05:00
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---
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2024-05-15 15:20:32 -04:00
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# `--rate`
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2023-12-11 20:30:44 -05:00
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Specify the maximum transfer frequency you allow curl to use - in number of
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transfer starts per time unit (sometimes called request rate). Without this
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option, curl starts the next transfer as fast as possible.
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If given several URLs and a transfer completes faster than the allowed rate,
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curl waits until the next transfer is started to maintain the requested
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rate. This option has no effect when --parallel is used.
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The request rate is provided as "N/U" where N is an integer number and U is a
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time unit. Supported units are 's' (second), 'm' (minute), 'h' (hour) and 'd'
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/(day, as in a 24 hour unit). The default time unit, if no "/U" is provided,
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is number of transfers per hour.
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If curl is told to allow 10 requests per minute, it does not start the next
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request until 6 seconds have elapsed since the previous transfer was started.
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This function uses millisecond resolution. If the allowed frequency is set
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more than 1000 per second, it instead runs unrestricted.
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When retrying transfers, enabled with --retry, the separate retry delay logic
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is used and not this setting.
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