{"version":"1.0","type":"rich","title":"React Performance Optimization  - Episode 45","description":"This interactive visualization combines a world bubble map and a time-series histogram to explore global migrant deaths in 2019. Users brush over the histogram to filter the map, which plots circles sized by the number of dead and missing at each location. The code uses React with `useMemo` for performance, D3 v5 utilities like `geoNaturalEarth1`, `geoPath`, `geoGraticule`, and `scaleSqrt`, and renders via SVG. Data comes from the Missing Migrants Project and world boundaries from World Atlas TopoJSON.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/64f6e1092d0b4bb3be775b71fcec539c?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}