Upwork might soon be a slimmer, more effective, and profitable company.Gig job facilitator Upwork (UPWK -0.63%) probably doesn't want this week to end. Its shares have been racing higher, advancing by nearly 23% in price week to date as of early Friday morning, according to data compiled by S&P Global Market Intelligence. Investors were encouraged by the company's preliminary third-quarter numbers, plus news of a restructuring plan and an analyst's bullish new research note.Preliminary results and pink slip ...