We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
LogStats Extension should log the IPM and RPM to the stats on spider_closed signal
## Summary

By default, the `scrapy.extensions.logstats.LogStats` log the details below to the standard logger every 60 seconds:

- IPM (_Items per Minute_)
- Items scraped
- RPM (_Requests per Minute_)
- Requests produced

## Motivation

We often find the need to retrieve the **RPM** and **IPM** after a job is finished. We can calculate this manually or we can check the logs for the last update of *LogStats*. However, this is tedious and inefficient as `LogStats` already has this data but isn't putting them somewhere that is readily available after the job is finished.

## Describe alternatives you've considered

We can pull out the last update of `LogStats` from the logs but pulling it from the API and filtering it out is expensive.

## Additional context

None


--- END ISSUE ---

Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
--- BEGIN FILES ---
Path: `scrapy/extensions/logstats.py`
Content:
```
1 import logging
2 
3 from twisted.internet import task
4 
5 from scrapy import signals
6 from scrapy.exceptions import NotConfigured
7 
8 logger = logging.getLogger(__name__)
9 
10 
11 class LogStats:
12     """Log basic scraping stats periodically"""
13 
14     def __init__(self, stats, interval=60.0):
15         self.stats = stats
16         self.interval = interval
17         self.multiplier = 60.0 / self.interval
18         self.task = None
19 
20     @classmethod
21     def from_crawler(cls, crawler):
22         interval = crawler.settings.getfloat("LOGSTATS_INTERVAL")
23         if not interval:
24             raise NotConfigured
25         o = cls(crawler.stats, interval)
26         crawler.signals.connect(o.spider_opened, signal=signals.spider_opened)
27         crawler.signals.connect(o.spider_closed, signal=signals.spider_closed)
28         return o
29 
30     def spider_opened(self, spider):
31         self.pagesprev = 0
32         self.itemsprev = 0
33 
34         self.task = task.LoopingCall(self.log, spider)
35         self.task.start(self.interval)
36 
37     def log(self, spider):
38         items = self.stats.get_value("item_scraped_count", 0)
39         pages = self.stats.get_value("response_received_count", 0)
40         irate = (items - self.itemsprev) * self.multiplier
41         prate = (pages - self.pagesprev) * self.multiplier
42         self.pagesprev, self.itemsprev = pages, items
43 
44         msg = (
45             "Crawled %(pages)d pages (at %(pagerate)d pages/min), "
46             "scraped %(items)d items (at %(itemrate)d items/min)"
47         )
48         log_args = {
49             "pages": pages,
50             "pagerate": prate,
51             "items": items,
52             "itemrate": irate,
53         }
54         logger.info(msg, log_args, extra={"spider": spider})
55 
56     def spider_closed(self, spider, reason):
57         if self.task and self.task.running:
58             self.task.stop()
59
```
--- END FILES ---

Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.

Here is an example:

```diff
diff --git a/examples/server_async.py b/examples/server_async.py
--- a/examples/server_async.py
+++ b/examples/server_async.py
@@ -313,4 +313,4 @@
 
 
 if __name__ == "__main__":
-    asyncio.run(run_async_server("."), debug=True)
+    asyncio.run(run_async_server(), debug=True)
diff --git a/examples/server_sync.py b/examples/server_sync.py
--- a/examples/server_sync.py
+++ b/examples/server_sync.py
@@ -313,5 +313,5 @@
 
 
 if __name__ == "__main__":
-    server = run_sync_server(".")
+    server = run_sync_server()
     server.shutdown()

```

diff --git a/scrapy/extensions/logstats.py b/scrapy/extensions/logstats.py
--- a/scrapy/extensions/logstats.py
+++ b/scrapy/extensions/logstats.py
@@ -9,7 +9,10 @@
 
 
 class LogStats:
-    """Log basic scraping stats periodically"""
+    """Log basic scraping stats periodically like:
+    * RPM - Requests per Minute
+    * IPM - Items per Minute
+    """
 
     def __init__(self, stats, interval=60.0):
         self.stats = stats
@@ -35,24 +38,45 @@
         self.task.start(self.interval)
 
     def log(self, spider):
-        items = self.stats.get_value("item_scraped_count", 0)
-        pages = self.stats.get_value("response_received_count", 0)
-        irate = (items - self.itemsprev) * self.multiplier
-        prate = (pages - self.pagesprev) * self.multiplier
-        self.pagesprev, self.itemsprev = pages, items
+        self.calculate_stats()
 
         msg = (
             "Crawled %(pages)d pages (at %(pagerate)d pages/min), "
             "scraped %(items)d items (at %(itemrate)d items/min)"
         )
         log_args = {
-            "pages": pages,
-            "pagerate": prate,
-            "items": items,
-            "itemrate": irate,
+            "pages": self.pages,
+            "pagerate": self.prate,
+            "items": self.items,
+            "itemrate": self.irate,
         }
         logger.info(msg, log_args, extra={"spider": spider})
 
+    def calculate_stats(self):
+        self.items = self.stats.get_value("item_scraped_count", 0)
+        self.pages = self.stats.get_value("response_received_count", 0)
+        self.irate = (self.items - self.itemsprev) * self.multiplier
+        self.prate = (self.pages - self.pagesprev) * self.multiplier
+        self.pagesprev, self.itemsprev = self.pages, self.items
+
     def spider_closed(self, spider, reason):
         if self.task and self.task.running:
             self.task.stop()
+
+        rpm_final, ipm_final = self.calculate_final_stats(spider)
+        self.stats.set_value("responses_per_minute", rpm_final)
+        self.stats.set_value("items_per_minute", ipm_final)
+
+    def calculate_final_stats(self, spider):
+        start_time = self.stats.get_value("start_time")
+        finished_time = self.stats.get_value("finished_time")
+
+        if not start_time or not finished_time:
+            return None, None
+
+        mins_elapsed = (finished_time - start_time).seconds / 60
+
+        items = self.stats.get_value("item_scraped_count", 0)
+        pages = self.stats.get_value("response_received_count", 0)
+
+        return (pages / mins_elapsed), (items / mins_elapsed)

{"golden_diff": "diff --git a/scrapy/extensions/logstats.py b/scrapy/extensions/logstats.py\n--- a/scrapy/extensions/logstats.py\n+++ b/scrapy/extensions/logstats.py\n@@ -9,7 +9,10 @@\n \n \n class LogStats:\n-    \"\"\"Log basic scraping stats periodically\"\"\"\n+    \"\"\"Log basic scraping stats periodically like:\n+    * RPM - Requests per Minute\n+    * IPM - Items per Minute\n+    \"\"\"\n \n     def __init__(self, stats, interval=60.0):\n         self.stats = stats\n@@ -35,24 +38,45 @@\n         self.task.start(self.interval)\n \n     def log(self, spider):\n-        items = self.stats.get_value(\"item_scraped_count\", 0)\n-        pages = self.stats.get_value(\"response_received_count\", 0)\n-        irate = (items - self.itemsprev) * self.multiplier\n-        prate = (pages - self.pagesprev) * self.multiplier\n-        self.pagesprev, self.itemsprev = pages, items\n+        self.calculate_stats()\n \n         msg = (\n             \"Crawled %(pages)d pages (at %(pagerate)d pages/min), \"\n             \"scraped %(items)d items (at %(itemrate)d items/min)\"\n         )\n         log_args = {\n-            \"pages\": pages,\n-            \"pagerate\": prate,\n-            \"items\": items,\n-            \"itemrate\": irate,\n+            \"pages\": self.pages,\n+            \"pagerate\": self.prate,\n+            \"items\": self.items,\n+            \"itemrate\": self.irate,\n         }\n         logger.info(msg, log_args, extra={\"spider\": spider})\n \n+    def calculate_stats(self):\n+        self.items = self.stats.get_value(\"item_scraped_count\", 0)\n+        self.pages = self.stats.get_value(\"response_received_count\", 0)\n+        self.irate = (self.items - self.itemsprev) * self.multiplier\n+        self.prate = (self.pages - self.pagesprev) * self.multiplier\n+        self.pagesprev, self.itemsprev = self.pages, self.items\n+\n     def spider_closed(self, spider, reason):\n         if self.task and self.task.running:\n             self.task.stop()\n+\n+        rpm_final, ipm_final = self.calculate_final_stats(spider)\n+        self.stats.set_value(\"responses_per_minute\", rpm_final)\n+        self.stats.set_value(\"items_per_minute\", ipm_final)\n+\n+    def calculate_final_stats(self, spider):\n+        start_time = self.stats.get_value(\"start_time\")\n+        finished_time = self.stats.get_value(\"finished_time\")\n+\n+        if not start_time or not finished_time:\n+            return None, None\n+\n+        mins_elapsed = (finished_time - start_time).seconds / 60\n+\n+        items = self.stats.get_value(\"item_scraped_count\", 0)\n+        pages = self.stats.get_value(\"response_received_count\", 0)\n+\n+        return (pages / mins_elapsed), (items / mins_elapsed)\n", "issue": "LogStats Extension should log the IPM and RPM to the stats on spider_closed signal\n## Summary\r\n\r\nBy default, the `scrapy.extensions.logstats.LogStats` log the details below to the standard logger every 60 seconds:\r\n\r\n- IPM (_Items per Minute_)\r\n- Items scraped\r\n- RPM (_Requests per Minute_)\r\n- Requests produced\r\n\r\n## Motivation\r\n\r\nWe often find the need to retrieve the **RPM** and **IPM** after a job is finished. We can calculate this manually or we can check the logs for the last update of *LogStats*. However, this is tedious and inefficient as `LogStats` already has this data but isn't putting them somewhere that is readily available after the job is finished.\r\n\r\n## Describe alternatives you've considered\r\n\r\nWe can pull out the last update of `LogStats` from the logs but pulling it from the API and filtering it out is expensive.\r\n\r\n## Additional context\r\n\r\nNone\r\n\n", "before_files": [{"content": "import logging\n\nfrom twisted.internet import task\n\nfrom scrapy import signals\nfrom scrapy.exceptions import NotConfigured\n\nlogger = logging.getLogger(__name__)\n\n\nclass LogStats:\n    \"\"\"Log basic scraping stats periodically\"\"\"\n\n    def __init__(self, stats, interval=60.0):\n        self.stats = stats\n        self.interval = interval\n        self.multiplier = 60.0 / self.interval\n        self.task = None\n\n    @classmethod\n    def from_crawler(cls, crawler):\n        interval = crawler.settings.getfloat(\"LOGSTATS_INTERVAL\")\n        if not interval:\n            raise NotConfigured\n        o = cls(crawler.stats, interval)\n        crawler.signals.connect(o.spider_opened, signal=signals.spider_opened)\n        crawler.signals.connect(o.spider_closed, signal=signals.spider_closed)\n        return o\n\n    def spider_opened(self, spider):\n        self.pagesprev = 0\n        self.itemsprev = 0\n\n        self.task = task.LoopingCall(self.log, spider)\n        self.task.start(self.interval)\n\n    def log(self, spider):\n        items = self.stats.get_value(\"item_scraped_count\", 0)\n        pages = self.stats.get_value(\"response_received_count\", 0)\n        irate = (items - self.itemsprev) * self.multiplier\n        prate = (pages - self.pagesprev) * self.multiplier\n        self.pagesprev, self.itemsprev = pages, items\n\n        msg = (\n            \"Crawled %(pages)d pages (at %(pagerate)d pages/min), \"\n            \"scraped %(items)d items (at %(itemrate)d items/min)\"\n        )\n        log_args = {\n            \"pages\": pages,\n            \"pagerate\": prate,\n            \"items\": items,\n            \"itemrate\": irate,\n        }\n        logger.info(msg, log_args, extra={\"spider\": spider})\n\n    def spider_closed(self, spider, reason):\n        if self.task and self.task.running:\n            self.task.stop()\n", "path": "scrapy/extensions/logstats.py"}], "after_files": [{"content": "import logging\n\nfrom twisted.internet import task\n\nfrom scrapy import signals\nfrom scrapy.exceptions import NotConfigured\n\nlogger = logging.getLogger(__name__)\n\n\nclass LogStats:\n    \"\"\"Log basic scraping stats periodically like:\n    * RPM - Requests per Minute\n    * IPM - Items per Minute\n    \"\"\"\n\n    def __init__(self, stats, interval=60.0):\n        self.stats = stats\n        self.interval = interval\n        self.multiplier = 60.0 / self.interval\n        self.task = None\n\n    @classmethod\n    def from_crawler(cls, crawler):\n        interval = crawler.settings.getfloat(\"LOGSTATS_INTERVAL\")\n        if not interval:\n            raise NotConfigured\n        o = cls(crawler.stats, interval)\n        crawler.signals.connect(o.spider_opened, signal=signals.spider_opened)\n        crawler.signals.connect(o.spider_closed, signal=signals.spider_closed)\n        return o\n\n    def spider_opened(self, spider):\n        self.pagesprev = 0\n        self.itemsprev = 0\n\n        self.task = task.LoopingCall(self.log, spider)\n        self.task.start(self.interval)\n\n    def log(self, spider):\n        self.calculate_stats()\n\n        msg = (\n            \"Crawled %(pages)d pages (at %(pagerate)d pages/min), \"\n            \"scraped %(items)d items (at %(itemrate)d items/min)\"\n        )\n        log_args = {\n            \"pages\": self.pages,\n            \"pagerate\": self.prate,\n            \"items\": self.items,\n            \"itemrate\": self.irate,\n        }\n        logger.info(msg, log_args, extra={\"spider\": spider})\n\n    def calculate_stats(self):\n        self.items = self.stats.get_value(\"item_scraped_count\", 0)\n        self.pages = self.stats.get_value(\"response_received_count\", 0)\n        self.irate = (self.items - self.itemsprev) * self.multiplier\n        self.prate = (self.pages - self.pagesprev) * self.multiplier\n        self.pagesprev, self.itemsprev = self.pages, self.items\n\n    def spider_closed(self, spider, reason):\n        if self.task and self.task.running:\n            self.task.stop()\n\n        rpm_final, ipm_final = self.calculate_final_stats(spider)\n        self.stats.set_value(\"responses_per_minute\", rpm_final)\n        self.stats.set_value(\"items_per_minute\", ipm_final)\n\n    def calculate_final_stats(self, spider):\n        start_time = self.stats.get_value(\"start_time\")\n        finished_time = self.stats.get_value(\"finished_time\")\n\n        if not start_time or not finished_time:\n            return None, None\n\n        mins_elapsed = (finished_time - start_time).seconds / 60\n\n        items = self.stats.get_value(\"item_scraped_count\", 0)\n        pages = self.stats.get_value(\"response_received_count\", 0)\n\n        return (pages / mins_elapsed), (items / mins_elapsed)\n", "path": "scrapy/extensions/logstats.py"}]}