Attempting to create a dazzling animation utilizing SVG filters and the stroke-dasharray technique to produce a gradually drawn "glowing" line effect has posed its challenges. After extensive research, a partially functional solution was crafted:
JSFiddle (size limitation prevents embedding in SO snippet)
The proposed approach involves dual sets of coordinates - one defining the lines themselves and another applying an SVG glow filter to them. Despite achieving a reasonably close visual approximation of the desired outcome, significant performance issues arise particularly in FireFox and Safari.
The primary concern revolves around the resource-intensive nature of the animation leading to sluggishness in the aforementioned browsers. Is there a viable method to preserve the animated "glowing line" effect while enhancing operational smoothness across all platforms? Could alternative techniques be explored to achieve the glow without resorting to duplicate path sets?
Furthermore, it should be noted that although R2-D2 imagery is not utilized, the actual line drawing consists of a comparably vast array of coordinates, exemplified for illustrative purposes.
Dabbling in the realm of animated SVGs as a novice, acknowledgment is made of the potential intricacy inherent in the current approach. Any guidance or insight offered would be greatly valued.