perf: adjust handling based on real data where single DELETE was bott… #555

Job	Run time
ci / check if job needs to run	8s
ci / prepare test matrix	29s
ci / MOODLE_310_STABLE - pgsql - php 7.2 - tool_excimer	4m 5s
ci / MOODLE_311_STABLE - mariadb - php 7.3 - tool_excimer	2m 54s
ci / MOODLE_35_STABLE - mariadb - php 7.1 - tool_excimer	3m 3s
ci / MOODLE_35_STABLE - mariadb - php 7.2 - tool_excimer	3m 0s
ci / MOODLE_35_STABLE - pgsql - php 7.1 - tool_excimer	3m 7s
ci / MOODLE_35_STABLE - pgsql - php 7.2 - tool_excimer	3m 25s
ci / MOODLE_36_STABLE - mariadb - php 7.1 - tool_excimer	3m 2s
ci / MOODLE_37_STABLE - pgsql - php 7.2 - tool_excimer	3m 23s
ci / MOODLE_38_STABLE - mariadb - php 7.3 - tool_excimer	3m 59s
ci / MOODLE_39_STABLE - mariadb - php 7.2 - tool_excimer	3m 21s
ci / MOODLE_39_STABLE - pgsql - php 7.2 - tool_excimer	3m 24s
ci / MOODLE_39_STABLE - mariadb - php 7.3 - tool_excimer	3m 20s
ci / MOODLE_39_STABLE - pgsql - php 7.3 - tool_excimer	3m 14s
ci / MOODLE_400_STABLE - pgsql - php 7.3 - tool_excimer	3m 27s
ci / MOODLE_401_STABLE - pgsql - php 7.4 - tool_excimer	3m 17s
ci / MOODLE_401_STABLE - mariadb - php 7.4 - tool_excimer	3m 8s
ci / MOODLE_401_STABLE - pgsql - php 8.0 - tool_excimer	3m 37s
ci / MOODLE_401_STABLE - mariadb - php 8.0 - tool_excimer	3m 27s
ci / Release to the Moodle plugin directory	0s
	1h 0m 50s

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