| | Consequence | Fix | |-------------|----------------|---------| | Running queries inside a subreport | N+1 queries, exponential slowdown | Use a single query + master-detail via data grouping | | Using java.util.Map for parameters across thousands of rows | Memory blow | Use JRMapCollectionDataSource with paging | | Not setting isLazy="true" on images | Every row loads an image from URL | Lazy load or inline as bytes | | PDF generation with huge tables | 2-minute+ reports | Use net.sf.jasperreports.export.pdf.force.line.policy=false and pagination |
Unlike lighter BI tools (Tableau, Power BI), Jaspersoft Studio is a —the actual rendering engine. When you design a .jrxml file (an XML report definition), Studio is merely a visual editor for that XML.
Unlike BI tools that focus on exploration, Jaspersoft focuses on precision. If you need to generate invoices, shipping labels, or complex regulatory PDFs where every millimeter matters, this is the toolset you want.
| | Consequence | Fix | |-------------|----------------|---------| | Running queries inside a subreport | N+1 queries, exponential slowdown | Use a single query + master-detail via data grouping | | Using java.util.Map for parameters across thousands of rows | Memory blow | Use JRMapCollectionDataSource with paging | | Not setting isLazy="true" on images | Every row loads an image from URL | Lazy load or inline as bytes | | PDF generation with huge tables | 2-minute+ reports | Use net.sf.jasperreports.export.pdf.force.line.policy=false and pagination |
Unlike lighter BI tools (Tableau, Power BI), Jaspersoft Studio is a —the actual rendering engine. When you design a .jrxml file (an XML report definition), Studio is merely a visual editor for that XML.
Unlike BI tools that focus on exploration, Jaspersoft focuses on precision. If you need to generate invoices, shipping labels, or complex regulatory PDFs where every millimeter matters, this is the toolset you want.