Publishing fifty pages in a day will not put fifty pages into the index that day. Indexing arrives in waves over days and weeks, not in a single sweep, and a big batch dropped at once gets metered out rather than absorbed whole. Studies of large page samples show the bulk of indexing landing in the eight-to-thirty-day window after publishing, with only a small share indexed inside the first week, and that fast slice tends to belong to established, high-authority sites.
On a young or low-authority site the effect can run counter to the intuition behind the bulk drop. Google gives a site it does not yet trust much only limited crawl attention, so fifty new URLs do not get fifty parallel evaluations. They queue. Google works through them in sequence, and as it goes it is also weighing quality, which on a new site means extra scrutiny rather than a wave of easy acceptances. The result is that a sudden flood can index more slowly than a smaller, steadier flow would have, and some of the pages settle into “Discovered, currently not indexed” while they wait their turn or fail the value check. The big push, meant to speed things up, can quietly slow them down.
This is an observed pattern, not a published rule with a fixed threshold, so treat it as a tendency rather than a guarantee. But the tendency points clearly at a gentler approach: stagger the batch instead of dumping it. Releasing the pages over several days, or in smaller groups, hands Google a digestible stream and keeps any single day’s load from swamping a young site’s limited crawl attention.
The question is what happens, and what happens is a slow, sequenced trickle rather than an instant fifty, often slower for the very volume that was supposed to accelerate it.