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[IMP] base: improve PDF generation speed for large tables

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This commit addresses performance issues when generating PDFs with large
tables using wkhtmltopdf. Processing time for such tables grows
exponentially with rows, causing significant delays.
Testing revealed a PDF with 250,000 rows took about an hour.

Previously, a workaround involving special XML template was provided to
users, inserting </table><table> tags every 500 rows.
This commit introduces a general solution at framework level.
Now, tables with >500 rows will automatically use this workaround,
enhancing PDF generation speed.

The number 500 is taken from opw-1689673 and seems to be a good
compromise between the number of split in tables and the processing
time by wkhtmltopdf

closes odoo/odoo#131933

Signed-off-by: Rémy Voet (ryv) <ryv@odoo.com>
This commit is contained in:
VAN BOSSUYT Nicolas
2023-08-21 12:39:19 +02:00
parent 7edde43100
commit ad06a7b2ad
12 changed files with 339 additions and 2 deletions
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odoo/addons/base/tests/split_table/first_nested.split2.xml
+46
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<root>
<table>
<tr>
<td>
<table>
<tr>
<td>4</td>
<td>4</td>
<td>4</td>
</tr>
<tr>
<td>5</td>
<td>5</td>
<td>5</td>
</tr>
</table>
<table>
<tr>
<td>6</td>
<td>6</td>
<td>6</td>
</tr>
</table>
</td>
<td>7</td>
<td>7</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
</table>
<table>
<tr>
<td>2</td>
<td>2</td>
<td>2</td>
</tr>
<tr>
<td>3</td>
<td>3</td>
<td>3</td>
</tr>
</table>
</root>