Text marking with this file
https://issues.apache.org/jira/secure/attachment/12769999/type3%20zero%20font%20size.pdf
has a giant size.

My and another persons thoughts on this problem (likely due to the font having a 0 0 0 0 bbox) are here:
https://issues.apache.org/jira/browse/PDFBOX-3076

f (lcalImage) {
                peratrLt.addOp(lcalImage.fn, lcalImage.arg);
                arg = null;
                cntnue;
              }
            }
            next(
              elf.buldPantImageXObject({
                reurce,
                mage: arg[0],
                Inlne: true,
                peratrLt,
                cacheKey,
                lcalImageCache,
                lcalClrSpaceCache,
              })
            );
            return;
          cae OPS.hwText:
            f (!tateManager.tate.fnt) {
              elf.enureStateFnt(tateManager.tate);
              cntnue;
            }
            arg[0] = elf.handleText(arg[0], tateManager.tate);
            break;
          cae OPS.hwSpacedText:
            f (!tateManager.tate.fnt) {
              elf.enureStateFnt(tateManager.tate);
              cntnue;
            }