The completion cache is currently not marked as simpledata. On the
course page it is frequently retrieved hundreds of times which results
in many calls to the slow unserialize function. By making a slight
change to the data format (using arrays instead of objects) we can
mark it as simpledata, which will avoid using unserialize.
The s() function includes a comment saying that parameter options
should be modified to improve performance once PHP 5.4 is required.
Since Moodle has required PHP 5.4 for some time, we should probably
make the change and remove the comment.
According to my benchmarking, these changes make s() about 7% faster
and will save a staggering 2ms from a typical course view that calls
it 8,000 times.
In a very rare cases where the columns are not declared explicitly, we
want to fetch single row only without a warning raised. This seems like
a valid use case for IGNORE_MULTIPLE flag.
Added an upgrade step to remove duplicate stamps, added a unique index
on (contextid, stamp) and modified the question_category edit code such
that stamp duplication in the same context is not permitted.
Delete tablesupdatedbyscenario before db reset to ensure
db is fully reset. In case user exits or process terminated
then the file will be left and can lead to wrong results
The function send_content_uncached() is meant to be used when serving
content which should not be cached by browsers/proxies. You will
use this in development mode, or when the request is malformed
but you need to return some fallback content which shouldn't be stored
under the URL it was requested from.
The function file_safe_save_content() should only be used for content
not stored in the file API. Good candidates for this are resource
which fit well in the localcache. The function tries to write the
content in the most atomic way as possible to prevent incomplete
writes or concurrent writes.
Use core functions that are faster for test file creation.
To support large requests for hashes, the core hash function
must support large hashes without recursion. PHP has a default
recursion depth of 100 and long hashes don't support this.
Remove transactions as they create performance problems for larger
courses and doesn't introduce significant benefit for developers.
Performance changes meant the times were much faster, a reasonable
guess was taken on performance of an average machine.
This patch adds two new functions to the event base to allow deprecation of
the individual events, without entirely removing them from the UI.
This is different to our normal deprecation procedure because all events
must support display of historical data. It must also be possible to view
the event information in the event monitor.
When a field is disabled in the page - no value is sent and modgrade is reverting
to the default. This change prevents the max grade from changing accidentally.
